Gotcha, just trying to plan ahead while i have the money. Thanks for the help

 

Just get back from the sandbox and everything else should be a piece of cake. There is plenty of support here for your project on the truck when you get back. Stay safe...

 

8~10psi should get you in the 11's easily. The built 4L65 should stand up to that. You might make a 10 sec pass or two on a built 4L65 but it probably wont like it. I have been mid 10's @14~15 psi with a T76 and a 6.0L with good flowing heads. I ran 11.50's @10~11 psi on the breaks at the 1000' mark. Your truck should be 250~300 lbs hevier than mine, but I run at 5000' ~6000' elevation.

 

44 days left and counting.Its a pain in the *** trying to build a truck through the internet cant wait to get back to the real world.

 

14 psi had me right at 600 while setting my engine on fire . As I recall, 14psi for Jim had him in the mid 600s.

 

You guys had similar cams in them didn't you? Jim yours was what's in Quik's truck now and Erik your is the one your reusing on your 427? Both 6L and both with 76mm turbo's?

 

i had a 6.0 and a 6.7 both with the same cam, both with the t76, both maxed out at 640rwhp but i am sure the 6.7 hit that number at a lower psi. i think the 6.0 was at 14psi and the 408 was at less boost to hit that number but i can't remember. might be able to do a search on it since i am sure i posted up.

 

Thanks Jim, I know you've posted the info up, I'm curious as to my own situation with my 6L at 18lbs. Just doing some comparison. I have a similar cam to both yourself and Erik, but am getting a smaller one.

 

you will need more than 119 MPH to clear 10.90


The input shaft on the transfercase has to be changed to fit the larger output of the trans...

As EVERYONE has said the 4l60 WILL NOT HOLD.

 

Can i get a t-case from a 80E so i dont have to change the shafts?