Originally Posted by GMCGreg

That's going to be a nice truck!! What you're asking about is pretty much exactly what my combo delivers. Wallace racing calculators puts it at about 800 crank and that doesn't factor in that it doesn't 60' great because it's traction limited and doesn't top end well due to terrible aero. On track tires it gets into boost before the throttle goes 100% . Cam and springs only 04 lq4 , so 9.4:1 compression, tiny cam motion 214/214 shelf cam . Idles with ~ 16.5 in vac. @ 725 rpm . Turbo was simple cast 7875 .96ar. Truck is over 4500 lbs when street driving, 4l80e , 3.73 and 30" tires would put it similar to yours without doing the math . It even drove well with 3.40 gears and stock converter, easily overpowered the street tires , more gear is not going help - just more spinning. Even in 4wd it would roast tires and possibly break stuff in first . If using pump gas I would say simple W/M kit with washer fluid, will add some safety. . Currently trying to control boost down to a lower level for street driving by switching to a 4 port from a 3 port and I also switched to a next gen billet 7875 with 1.25 housing and 9 blade vs 10 turbine in hopes to both make a bit more power and hopefully slow spool a bit so I might be able to floor it below 75 mph and not be a smoke show , can always hit scramble and add more power on the fly . What's the expected weight of this truck ? Combos that are good in 3500 lb cars might not be as good in a 5000lb truck