Costs for 5.8 vs 5.0 strokers

[1sicklx]

Seeing that you're buying more or less the same stuff for either route, approx how much more would it cost to go with a 5.8 based engine as opposed to a 5.0 base?

[qkjuicedpony]

it all really depends on what you already have.

If you are starting from nothing then go with a 5.8.but if you already have a lot of 5.0 based mods like decent headers,intake etc then i would stay with a 5.0.

the cost difference is normally in fuel system setup...especially if you go back EFI.

the year model of the car makes a little difference too

[Italian LX]

It depends on what kind of 302 mods you already have and whether or not your new combo will use the same parts.

If you're starting with a stock 302, the cost difference won't be much more than $600. The 351 may require better flowing heads, so those will cost a bit more and the lifters will be significantly more; expect to pay around $500 for a set as opposed to a $200 for the 302. If you don't plan on going all-out on the build, then you can certainly reuse the 302's flywheel and balancer, but you'll likely replace those with better parts

On the other hand, if you already have some good 302 mods, then you may be able to get away with a cheaper build by reusing those parts. Things such as headers, intake, distributor, balancer, and flywheel can be used on the 302 but must be replaced if you're going with the 9.5" motor.

[1sicklx]

Well, let's say for discussion that you have a 94-95 with a cobra longblock ... the only extra that's really on the table is an extra cobra lower that's available for porting to save on down time if going the 8.2" route.

Regardless of whether a 302 or 351 block is used it is planned to beef up the tranny, and redo the induction setup. For a street car would you say it's worth the money to go with say a 393 as opposed to a 347 even if you plan to keep the induction setup on the conservative side?

[Italian LX]

I forgot to add above that you'll likely need to buy a new hood too, if you go the 351 route.

[1sicklx]

I forgot to add above that you'll likely need to buy a new hood too, if you go the 351 route.

Yeah, and that's one thing I consider a negative .. lately I've become a fan of the "sleeper" look. :metal:

[Italian LX]

Yeah, and that's one thing I consider a negative .. lately I've become a fan of the "sleeper" look. :metal:
You can still use a stock hood with a 351W -- it just takes some work and special parts. Usually a tubular K-member is involved and drop-mounts. It also limits which intakes you can use.

[1sicklx]

It also limits which intakes you can use.

:shrug: even though it will kill the top end the cobra upper with gt-40 truck lower would probably be best in this scenario wouldn't it (hood clearance)? I'm biased towards the gt40 intakes anyway :jester:

[Italian LX]

:shrug: even though it will kill the top end the cobra upper with gt-40 truck lower would probably be best in this scenario wouldn't it (hood clearance)? I'm biased towards the gt40 intakes anyway :jester:
If you're sticking with a GT-40 intake, I wouldn't even bother with anything much bigger than a 351.

[qkjuicedpony]

you have to use a tubular k member and drop motor mounts and in some cases you have to shim down the k member too.

if you were building a stroked windosr i honestly wouldnt waste my time with a gt40 style intake.it would be fine on a stock 351.

[qkjuicedpony]

If i were you i would buy stephen johnsons motor and be done with it....you will find out it's cheaper than building it yourself:D:D

[QWKSNKE]

If i were you i would buy stephen johnsons motor and be done with it....you will find out it's cheaper than building it yourself:D:D

agreed.

You guys are more positive about the GT-40 then I am, I wouldn't run it on a stock 351.

[slvrbullit]

Well, let's say for discussion that you have a 94-95 with a cobra longblock ... the only extra that's really on the table is an extra cobra lower that's available for porting to save on down time if going the 8.2" route.

Regardless of whether a 302 or 351 block is used it is planned to beef up the tranny, and redo the induction setup. For a street car would you say it's worth the money to go with say a 393 as opposed to a 347 even if you plan to keep the induction setup on the conservative side?


Get ready to spend close to a $1k just for headers to fit a 351 in a 94-95 body. So far kooks is the only company that I have seen make them.

[03slobra]

If i were you i would buy stephen johnsons motor and be done with it....you will find out it's cheaper than building it yourself:D:DI agree.Thats a very reasonable price.It would twice that to build.

[1sicklx]

If i were you i would buy stephen johnsons motor and be done with it....you will find out it's cheaper than building it yourself:D:D

It's a great deal, but the kind of application I'm talking about leans towards EFI and hydraulic roller.

There's a lot of good info flying around here. :popcorn:

[qkjuicedpony]

buy his motor like it is

sell the carb setup and you have enough to buy a decent intake like a systemax or something comparable.


dont knock the 331's...i just saw one make 421rwhp......:D

[1sicklx]

dont knock the 331's...i just saw one make 421rwhp......:D

who's knocking them?

Remember this thread was just about mulling over the cost differences between the 8.2 and 9.5 routes ... not really about what I necessarily plan on doing. (not to mention I don't have 4 grand in my back pocket to spend all at once either)

Truth be told I was trying to hammer out ideas about whether to do a simple 302 h/c/i or move up to a mild-mannered stroker setup and someone suggested just ditching the 8.2 and move up to a 351w based engine since "you'd be replacing everything anyway". That's where the question of cost pros/cons came in.

Tommy's point about swap headers for sn95's was something I hadn't considered and would play a big part in the final cost of a swap.

[qkjuicedpony]

when i did my 94 with the windsor i did try 4 different sets of headers and wound up getting the kooks headers.2 years ago the cost was like 980 shipped

[natedawgg94]

would you need the kooks even going with a tubed k-member setup?

[coupe]

Jon. Have you ever driven a stout 331 or 347 streetcar?

You'll keep the sleeper image, and alot of parts you already have by sticking to an 8.2 deck motor. And it will be plenty.

[natedawgg94]

i agree with coupe except with the stroker you will not be able to keep your old flywheel and damper most strokers are 28oz.

[coupe]

:werd: good time to put a nicer damper and flywheel on the car anyways.

[mrmustangconvert]

Get ready to spend close to a $1k just for headers to fit a 351 in a 94-95 body. So far kooks is the only company that I have seen make them.


i did a 351 swap into a coupe not too long ago. i found a 351 2v with the c-8 casting and bought it for 100 bucks. we ported the heads and re seated the valves and what not. put a torker 2 intake with a 650cfm carb and some bbk long tube headers which cost around 400 dollars. and we put a t-5 in it with a 4 cyl rear end still in it.

as far as headers go around 400-600, bucks but i could be wrong about the different body styles between the two.

[Italian LX]

:werd: good time to put a nicer damper and flywheel on the car anyways.
That's exactly my point. When building a completely new motor, you're likely to buy new stuff even if you already had something that might work anyway.

[Italian LX]

i dont knopw about that, i did a 351 swap into a coupe not too long ago.
What year coupe was it?

[mrmustangconvert]

What year coupe was it?

that 84 mustang

[Italian LX]

that 84 mustang
Yeah, read his post again. Tommy was refering to the SN-95 body Mustangs. Apparently, there is only one type of header that fits well and they are very expensive.

[mrmustangconvert]

Yeah, read his post again. Tommy was refering to the SN-95 body Mustangs. Apparently, there is only one type of header that fits well and they are very expensive.


ohh ok i wonder how different fox and the sn95s differ

[Italian LX]

ohh ok i wonder how different fox and the sn95s differ
I know they are diferent, but not sure exactly how. I'm only taking Tommy's word for the difference in header cost.

I too did the swap in a fox coupe and got my headers for just over $400 brand new.

[natedawgg94]

seems like with a 900ish price tag one would be tempted to try doing your own.

[1sicklx]

seems like with a 900ish price tag one would be tempted to try doing your own.

Or just forgetting about the extra cubes and stick with a 8.2" deck :jester:

[03slobra]

Jon. Have you ever driven a stout 331 or 347 streetcar?

You'll keep the sleeper image, and alot of parts you already have by sticking to an 8.2 deck motor. And it will be plenty.I have a 331 street motor hyd. cam nothin radical.I like it:popcorn:

[slvrbullit]

I was gonna go the 351 stroked route before I built the 331 I had and then searched for some 351 headers for the 94-95 body cars and Kooks was the only place, on top of the $1k price tag, they come in pieces and are not coated so there is another $300ish to have them Jet-hot coated.

[BAD INT]

Jon. Have you ever driven a stout 331 or 347 streetcar?

You'll keep the sleeper image, and alot of parts you already have by sticking to an 8.2 deck motor. And it will be plenty.


Me? if so YES

[coupe]

Sorry, no not you BADINT. 1sicklx is also Jonathan.

[1sicklx]

I wonder if you could use these shorty swap headers for a fox on a sn95 if you weren't running the EGR system ....

BBK 351 swap headers (http://store.summitracing.com/partdetail.asp?autofilter=1&part=BBK%2D15110&N=700+4294923429+4294839039+4294908331+4294840125+ 4294918680+4294908282+4294871271+115&autoview=sku)

They would be restrictive for the strokers, but could be a cheaper alternative for a mild 351/357 than kooks.

[qkjuicedpony]

you can use the shorties if you wanted to.

but like you said only on a stock style motor...and who wants one of those:D

[1sicklx]

you can use the shorties if you wanted to.

but like you said only on a stock style motor...and who wants one of those:D

Someone who wants a stronger block and a few cubes to spare :shrug:

[coupe]

The capability of shorties will surprise you Jonathan. Run 'em.