What The Hell Happened !

[Capri306]

185's are a bit much, IMHO, on a 308 unless you really get it up there in the RPM range, say 3500-7000. I didn't notice which intake/tb/MAF setup you have, but I'd say you need something along the lines of a Victor Jr/ Trick Flow breadbox to really need 185's. How much compression are you getting? Check it with a gauge just to be sure it's spot-on. One vital thing you NEED to find out are the spec's on that cam. The cam will have more effect than any other component in or on the engine, regarding its "attitude."

Coincidentally, I have a friend who ran World Castings' Windsor Sr. heads on a 302 (similar in essence to what you have). Granted he had not-so-great compression, but I still beat him with a mostly-stock '87 Notchback with ~150k miles. A friend of his bought the car and basically shifted at the rev limiter, and he got it to drop a full SECOND in the ¼-mile. The moral is that on these high-flowing heads, you either have to have a LOT of cubes or a LOT of revs.