I am currently fixing up my dad's old Chevy 1982 K30 Dually, and I was thinking about upgrading the engine to a modern one but I still need to get a new transmission. So I was wondering if anyone knew a good engine and transmission that would be able to fit in the truck, At the moment I believe it has a GM/Detroit 6.2l v8 Diesel engine, and for the transmission it is a 3 Speed TH400 Transmission, and if it is a modern engine I will have to find some knew circuit board and wiring kit.