if it came from an 80e truck it would have bolted up to the V6 converter with nothing more than bolt hole issues at the most, they have the Gen1 length crank setup using spacers, longer bolts and flat flexplate. I faced this issue years ago when I put the 97 80e in behind my 408. I originally had a Gen3 60e behind the 408 and had to put the spacer on the crank and get a flat flexplate like the Gen1 vehicles have.