spark plug question

[86GTPONY]

Originally Posted by QWKSNKE

.042 seems like a lot with 16psi of boost. I would think that .035-.036 would be best

Thanks Lee! I'm gonna re-gap this weekend & see.

Originally Posted by SvoBrown

.32 to .36 runs best for me. 20 psi. Motorcraft 764 I think. Need to look to make sure. Change them every 10 k,

Aren't the 764's Autolites? Same thing, anyway I'll try .035 as I'm only a little over 16psi. - One thing I have noticed is a slight orange color on the plugs (it's always been like that.) I blew a head gasket about 6 months ago, had the head magnafluxed & rebuilt. Put in a Ranger roller cam and a 1035 head gasket....still orange.