Slant 6 & A833

Yeah they have gone crazy in the last few years.
Can you get the truck trans reasonable?
You can use the bell housing and such, for the short tail version. The rear mount/ crossmember will be the same location.
I believe there may be an adapter ring that you can get that will center that flywheel as it should be.
It seems I just read where someone here was wanting to do the same swap the opposite way, older trans to newer crank.
Another thread I saw (don't know if it was here) about someone wanting to put a short tail version of that trans in a truck. Seems you all need to get together and swap parts, as you have what they need and they actually have what you need.
That said I have put the short A/F body version of that trans in a truck back in the early 90s.... it got done but I don't remember all the details, or what all I had to make/modify.