[69birdboy]

Assuming that is true, you need to get your heads milled because compression will be 8:1 or even as low as 7.6:1 with those heads. Otherwise you'll need a much smaller cam and you wont get a nasty idle without killing your performance.

[*67firebird*]

jdmerk, you and I are going through the same situation, i am using a 400 head, performer intake, but i am sticking with my q-jet i've heard that it sometimes better than some out-of-box 750 carbs. I am going to be using my stock 670's and those heads keep me at a high compresion like 10.75:1, im going to be using the 2802 summit, with 3.55 gears and a converter that can stall between 2500-2800. The combo works out great with the intake and cam, both have the power range starting at 2500 rpm, so any converter that starts at 2500 would be a good setup, some people tell me to use a 3.73 for a better kick in the pants!!! but with the cam having a LSA of 114, the 3.55 can save me a few bucks on fuel. Otherwise if money is not the issue go for the 3.73. JMO

[jdmerk]

what if i got a set of #46 heads, they are 75cc heads which should put me somewhere between 9.5:1 and 10:1 but they have a smaller intake valve 1.96 vs my 6x's 2.11, i can pick them up for about $200 but would they benefit me even with the smaller valves or should i stick with the 6x's