In all honesty, it was far easier to mount the Cummins in my truck than it was to get the I-H out.
The extra space under the hood is un-believable.
Everything is WAY so much easier to access and maintain.
I think people over-complicate putting a Cummins in a truck.
They call it a "conversion", requiring all sorts of mysterious and magical store-bought goodies.
The only thing I paid money for was a pre-fabricated pair of engine mounts from a guy named Randy outside of Phoenix AZ, about $300 if memory serves; well worth it, because, we only picked the Cummins up ONE time, eased it down into the Ford, and EVERY bolt lined right in place.
I could have welded up the mounts myself, but we probably would have had to lift the engine in and out a few more times, whilst I tweaked the angles and bolt-holes.
I have nothing bad to say about my old IDI; it stood up and made my living for half-a-million miles and is still running strong, or as strong as an IDI is capable of running.
BUT, installing that Cummins was the best move I ever made, PERIOD.
I over-doubled my fuel mileage, easily doubled the power, and NOTHING leaks.
Everyone claimed that I would have to remove the front clip; all we did was to remove the hood and maybe the radiator; admittedly, it was close maneuvering, but nothing as difficult as removing and then re-installing the front fenders, etc.
I didn't even evacuate the A/C system; I flopped the compressor over on the left fender, hoses still attached, and when the engine was installed, swung the compressor into it's new bracketry, without losing the charge.
The transmission crossmember moved rearward one hole.
The Ford alternator pulley was a direct swap to the 8-rib that was on the Dodge/Cummins Nippon-Denso unit.
Etc.Etc.Etc.