Quote:
Originally Posted by coupe
Port the lower, yes... but I'd also install a box-upper on it (Downs, cartech, etc...). It will really wake up the 306 especially with the X-303 cam and the Windor Sr. heads.  |
Tmoss said only the lower for this combo so that will be all. I have looked for a Downs before but had no luck. I remember you suggesting that before.
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Proud owner of 93 Cobra #1928 
306ci Forged flat tops, Windsor Sr iron heads, FMS X-303 cam, OE Cobra upper and lower, 65mm tb, 70mm maf, 24lb injectors, BBK shorties, Summit H-pipe and Flo-bastards
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