Need a little guidance from the gurus

Deuce
I'll tell you a little secret; MPFI engines can go 400,000 km and still show very little cylinder wall wear. At 200,000 they can be very nice, needing nothing but a chain.And it's a roller cam.
So, with a good eye and a bit of luck, you could be looking at nothing but a freshening up.You will need a tranny tho, as the sixer will not fit.If you buy them together, or you buy a complete donor vehicle, you will be set. Stay away from the auto-overdrives unless you have some metalworking skills,cuz they don't fit without surgery.