I was looking into AFR alu heads and 190cc with i guess 68cc CB chambers are looken nice for $1250 shipped My Q is Thunder Racing has the heads and they said:

"Note 305ci requires 1.940-1.550 valves for bore clearance."

And the heads come "2.020 intake and 1.600 exhaust" standard. What should I get to get bore clearance for my LO3 and how much is it thanx guys

I should also mention i will get the heads after i get a new exhaust, headers, LT1 cam, intake manifold and 1.5RR.

SSBlueOx

 

I wouldn't run those heads no matter what on a 305, plus the 6 8cc chambers will lower compression excessively!

 

ight then ill do everything cept heads till i get the 350HO that i plan to get in like 3-4monthes. Thanx just needed some info

SSBlueOx

 

Should I just get my stock iron heads ported? And will the LT1 cam be good for ~40hp? thanx again

SSBlueOx

 

The problem with a 305 and good heads, is that the bore is so small, that the valves aren't entirely above it. They tend to hang over the edge a bit. And when that happens, they smack into the top of the block when they open, instead of going down into the cylinder. Not suitable for racing.

 

You mean like a "poor-man's" splayed/canted valve setup? Where only the faces of the valves are splayed? Who needs all that expensive casting and machining, anyway?