You know the only difference is the pump to increase hp? Injectors, liners, pistons, coolers, turbo, piston cooling nozzles, heads, crank, fuel pressure relief, camshaft, rocker arms, the list goes on. All the same? I ask because I have seen enough engines "upgraded" that don't last long. Best was less than a day, few hours maybe. Pistons melted. To a few days. Piston broke in 2, ran great until it didn't. One guy was driving tractor home. No load on the engine when it quit. Seen enough to be very hesitant about mixing parts. Both to save a $ or gain power.

 

9370 quad trac as far as I know has an electronic injection pump on an N14. the 9380's had an old style 855 on the first year or 2 of production and the rest of the production run had mechanically injected n14's. there should be no physical change between the injection pumps, just need a new software flash maybe, I am not sure.

Any injection shop worth their salt should be able to advise you on getting a few more ponies out of that motor. If you need a new injection pump it will have to come off of another quadtrac 9370Q or 9380Q.