As Char1355 said use your existing HX30w combined with the HX35w for the twin set up. The HX35 by it's self is to slow to spool on the 4B, All you'll get is lots of smoke, your power will move to the top end, no bottom end torque.4bt out of 2000 freightliner tater chip van
I'd like 300 , I think the truck can handle it, 56 flat fender power wagon,intercooler dana 60/70, nv4500 and atlas t case.If you have a Super HX30W turbo that is the largest single you can use on a 4bt with good results. Larger units like the HX35W have been tried and come up short. They boost slower, produce most of their power at higher RPM, and have higher EGT. How much power are you looking to produce? A single turbo on that engine starts to reach its limits around the 225-250 HP range. That is also when the stock 5x.010 injectors begin to play out. Above the you'd want one size larger injectors which are 5x.012. Those came on the 250 HP 4bt marine engine. That coupled with twin turbos can get into dangerous power levels. You have to make sure the rest of the engine is up to the task. Have to be sure the vehicle can stand up to it as well.