408 short block will be 9to1 with 63cc 915 smog heads with 2.02 /1.60,hard seats , bowl work.
performer intake,

need a carb , was thinking a 650 holley vacuum secondary , want to build torque, heavy truck.

headers....1-5/8

i like the comp cam extreme stuff, takes advantage of the .904 lifter, which cam do you think i should use?

using stock rockers , thinking 5800 - 6000

this truck has 4.10 with 37 inch tires

In a 3/4 ton 4x4 with 37" tires?

Only the Comp XE...HL line is speced for the 0.904 lifter. I believe all Lunati Voodoo cams are. Hughes is where I'd go, They'd make a good choice.

R.