X-heads / 6 Barrel combo porting

cookietruck said
also with a .64 fifth gear, i would choose gear ratio based on what i wanted the rpm to be in 5th at cruise. atleast a 3.91 gear, maybe even a 4.30...depends on tire diameter...

The TK-500 has a .68 5th. My belief is that the 1st gear ratio of 3.27 and a 3.55 rear gear is great for taking off without having to touch the gas. I drove the trans and rear gear for a couple of years and it was very driver friendly. Dad's rear gear is 3.55 as well and he is getting my trans.
The differences will be that my engine is a 408 with Hughes ported Edelbrock's, 9:1 cr with a D1-SC Procharger. Dad's engine will be a 3.31 stroke, similar cam, similar compression. The Procharger shouldn't affect the take off as it isn't making boost at the rpm's that you would normally engage the clutch under normal operation.

go-fish said
Tremec's calculator says the 1:1 cruise speed will be 50 mph on a 27" tire. With the .68 OD he will be at 73 mph.

Forgot to mention that the RPM put in the calculator was 2200 rpm.