The existing 450 engine is still in very good shape aside from one cyl. fouling because of bad valve seals. There is no real economic justification for the swap. I don't really drive the car very much, but the thought of breaking down on some lonesome S. Texas road at zero early thirty in the AM if not very enticing. Mostly, I just want to try the swap.

I had looked at Chevy products but apparently the bell housing is about 1 inch too big and requires some serious beating back of the transmission. I am sure I could get the 4.3 lt. V-6 in there but I have set what is left of my mind on the 5.0 Ford