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As far as performance goals, I was just looking for a healthy setup that would make decent power. I'm not out to put together a car to thrash at the drag strip every weekend, but I'd like it if the car were capable of laying down a respectable time, or surprising a car two at the stoplight.

Sorry about the lack of info. The Cam is a Comp 268H with a 268 duration and 454 lift. The reason I wanted to switch heads is because they're still the stock piece off the smog motor, and from what I've heard, they're far more restrictive than pre-EPA pieces.

I've got 1975 318 with the smog heads and cam, and I've been putting together stuff to replace all of it. Got the factory four-barrel 340 manifold and a hotter cam, but I need heads. I've heard that certain 340 heads can be bolted onto a 318 to boost compression, but I've also heard certain...