Hey everyone me and my dad are wanting a father son diesel project and I'd like your help and experience , but not your average build though I have a 99.5 7.3 ext cab f250 4x4 It's my high school truck and take great pride in it and don't wanna get ride of it or park it , anyways I really wanted to be different and build a 7.3 to make 650 700 hp , that's not something you see very often and that's what I'm all about being different and surprising people.but turns out building a 7.3 to that amount of power the right way with a transmission to hold it would be a little out of what we would wanna pay, soooo my dad and I have been looking into the 6.7 motors he has one as a work truck and pulls with it everyday about 150 200 miles and he is very impressed with it and since I've showed him the h&s 6.7 making those insane nitrous dyno passes it blows his mind and he is head over heels about building one , now I understand some of the 6.7 motors have had troubles within 100k miles and be bone stock but that's just the luck of the draw I guess you could say , we plan on building it right and taking it step by step . Now with saying all that ,,, how hard would it be to put a 6.7 motor and tranny in a 7.3 ?? I've called two or three people they said the motor would fit in the 7.3 engine bay fine , the people I talked to said the hardest part of it probably would be putting the 6.7 dash in the 7.3 ? But they said it could be done. What's y'all's take on this? , or if there's anyone out there that's done this plz tell me because I have a lot of questions I'm not asking , and yes we found a totaled out king ranch 6.7 with 32k on it and bought it but we have been to busy workin to take time off , plus we just now decided what we wanted to do .