We are doing a rat rod. Frame work done in house. M2 Freightliner chassis with air ride front and rear. We dropped the front and rear suspension 8 inches. The engine is a 6.0 liter out of a 2005 Chevy 1500, the cab and front frame is a 1975 International 1600. We took the 345 out to make room for the 6.0 liter. We are keeping the patina on this truck. Rust and all.