From the thread on the other site:
The only thing the 7.3 has in common with a 460 is the transmission bolt pattern. I guess International had to cast the 7.3 block so Ford could bolt their transmission to it.
FWIW, if the PSD is anything like the IDI, there's an adapter plate that changes the bellhousing bolt pattern from IH's to what Ford wanted to use. The starter actually bolts to this adapter plate and not the bellhousing; that's why the starter can stay in place when you pull the tranny. That said, from everything I've heard, the diesel bellhousing pattern is NOT the same as the big-block g@$$er bolt pattern. IIRC, they're close, but one or two bolt holes won't line up. This isn't from personal experience, though...never dealt with a g@$ Ford...
TimMiller said:
Just have to say it 6.9/7.3 Was never a gas burner. That was chevys bright idea to convert a gas engine into a diesel.
Umm...I'm not so certain on that. There are claims out there that the 6.9l block was designed originally as a gas engine, then altered to run as a diesel (different crank, pistons, heads, conrods, etc). If you look at an IDI block, there is a plug where a distributor would have gone. But, if you've ever seen the bottom-end of an IH gas engine (304, 345, 392, etc)...it's as strong as most diesels out there
IH gas engines actually can live as long as many diesels...just, the fuel economy is absolutely horrible.