for a crawler truck i stick with a small cam say for instance a comp 267 deff. not a ls6 cam and if that 2000 model has cast iron heads deffinatley get some 317s at least. That motor is gonna make plenty torque. I have freinds that made mean mud trucks with way less power stick with a small cam main thing is very low gears the motors gonna make plenty power stock spend your money on suspension and axles

 

Thanx for the help guyz i'm prolly gonna run rockwells and a doubler so this thread is really about big torque numbers. I got this truck cheap and could sell it for a bigblock truck but I really like the LSX motors. I'm looking at what cam and intake would be the torqiest, I was gonna run an ls6 intake but read that the truck intake makes more torque. Since I'm moving the rear axle forward I might have to move the engine/tranny forward which means I could flip the intake around backwards for the snorkle.

anyway can this motor make torque #'s like a blower
or do I need to get a bigblock or blower?

 

Anything on rockwells is not going to be a daily driver, or at least not for long. Chances are this truck will quickly become a vehicle you don't take outside a 15-20 mile radius from it's birthing place unless on a trailer.

Rockwells come stock with 6.72's, so all you need to make sure this 6.0L produces is big torque down low. Without spending a ton of money on a stroker kit or some form of boost, you are stuck making low end torque the old fashioned way: small heads, small duration cams, high compression ratios and an intake manifold designed around throttle response and low rpm velocity. You have the 5.3L heads which coincidentally also bump your compression, you have the LS6 camshaft and springs and I assume you still have the stock truck intake manifold. Sounds like you've got everything this 6.0L needs already except for decent equal-length long tube headers and a free flowing exhaust. Finish up with a tune and you'll be good to turn those rockwells and 40"+ tires in 2HI/4HI and any time you're off road use one, or both, of the 4LO ranges.