Looking for a 4 valve E6 Mack engine

Ruined the crank in an ‘86 Superliner, due to #5 cylinder rod bearing. Looking for another E6 300 - 350hp engine.

 

I don’t know squat about a Mack engine, but they’re more similar to a Cat setup, than a Cummins. This is my in laws truck and over the past few years they’ve swapped injection pumps on it a couple times and they’re not diesel mechanics(not that I consider myself one) but I do realize they time off the pump. The pan was already dropped, when I got there this afternoon and there’s literally no top rod bearing left of #5. There’s only about half the bottom bearing. Everything else up through the hole looked fine, including liner and piston cooler. #5 journal is ####. Didn’t notice anything as bad from any other cylinders. Thrust washers looked fine too, with very minimal end play.

 

I’d drive it, if it had the Cat in it. A or B model Cat? A2A or JWAC?