16.1 Compression Pistons and back off your IVAs,keep the compound turbos. Have someone tune it (I have a really really good Cat tuner if you want his number,he can give you great advice) Put a PDI manifold on it too,will help the mpg.
Damn. I like how simplistic it is doing an inframe on a pre emissions engine. Compared to the new new. With all them sensors and extra shit they put on em. I may drop a cat in my 579 when it’s time for an in frame. I got the cancer removed and had my guy put a tune on the ol paccar it’s originally rated at 455 hp he bumped it up to 580 hp