I want to build a motor built for towing. I want numbers around 400hp and 800ft/lbs. It needs to be reliable and last a long time. In theory, I would like to build it from the inside out and have it be capable of 400 hp before I go after injectors and a tuner....not sure how possible that is, but the way I see it, I have 444 cubic inches to play with so it shouldn't be a problem. the plan I have so far is to purchase a quality rebuild kit with .030 pistons. A new set of forged rods. Find a bigger cam (suggestions would be helpful) open up the heads and install bigger valves and springs. If I can do a full roller set up for the valve train I would like to. (Again suggestions on the valvetrain will be helpful) Also planning on doing a main bearing stud kit and a head stud kit. The trans is a ZF 6 speed, not really planning on doing much with it other than a good clutch. I know fuel delivery is a big factor in this equation too. I have already done the "hutch mod" and put a new spring in the FPR housing along with a new fuel pump, that netted me 72psi of fuel pressure. In my opinion that's pretty good. should be able to run some slightly bigger injectors without an issue. I am planning on running a new HPOP, and doing the crossover kit to make sure all injectors are getting the fuel they need. For the turbo...not too sure yet. It is an early 99 and im not sure how much power that turbo is able to support. I know I could make 400 hp pretty easily with some big injectors, a mean tune and a water methanol system but that isn't the way I want to make it, I wanna do the old school way and build it from the inside out to do what I want it to. Now I could be 100% wrong in my plan here, and if I am, someone please tell me. but any info that could be passed this way on building this engine would be appreciated.