Thread: Newbie with 307 Questions?

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Post #1....

Originally Posted by gte436e

I don't what a supertruck, just something to have fun with, and use around town. AND NO I DO NOT WHAT TO SWAP IT OUT FOR AN 350. Not for what I want to do with this truck.

Post #7....
"What aluminum heads could work with the 307?"

Is it just me? First you are adamant about retaining the 307, then you seem ready to lay down $1100 for a set of aluminum heads for it when you could make way more power with a boneyard 350 using boneyard Vortec heads. In my opinion, spending money to build an aluminum-headed 307 would be like administering steroids to a midget.

Now that I have that out of my system, I'll try to answer your question. I might try using the Edelbrock #60879 heads. They have 60cc chambers, so it would be easier to make some decent compression ratio with them. The intake runners are 165cc's, so you could more easily keep port velocity up with the small displacement 307. They're drilled for the early intake manifold bolt pattern too, so that makes it easy to mount any of the early Gen I (55-86) existing hot rod intakes to them. They use centerbolt valve covers, so the early valve covers won't work. Valves are 2.02"/1.60". I would call Edelbrock and inquire about using them on a 3 7/8" bore (3.875") motor. Now, if you're going to bore the motor and install new pistons, then the bore will be 30/1000's larger at 3.905", so there may or may not be any physical or flow limitations between the valves and the bore, depending on the valve lift of the cam you will use. I don't know the spacing of the valve centerlines on the 60879 heads. Call Edelbrock and talk with them.
http://www.edelbrock.com/automotive_.../contact.shtml