[Ron H]

What ype of 6X head, 4 or 8? Probably 8. You don't have to swap heads. XE cams are made to help with ow compression heads.You could shave down the ones you have to increase compresson. You need to confirm what pistions you have. Overbore will also increase cubes, compression. Do some homework and search combo/cam threads. There is alot of threads on this.

[jdmerk]

ok so i guess ill pop the heads off next time i get a chance and cc the heads just to be sure whats in there...it was killing me not knowing anyway

[jdmerk]

OK so i was told that im runnin on all stock internals. So assuming that info is correct what would be the best cam selection for me?

[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