Diesel_brad
Dunce
I just bought a very clean 86 f250 w a6.9 and a 4 speed. I am spoiled from my 00F350 PSD that was chipped. I know my 6.9 will never make any good power reliably. My question for you guys is. How can i make 400hp reliably for towing and everyday use in a 12V. and how difficut is it to put in a 86 f250? Can i use a ford 5spd diesel trans behind a 12v?