I had a 1970 F250 back then---I bought a complete Lincoln Mk3 460 complete with c6 tran and a/c, p/s etc--it was the first 460 put in a pickup and I had to build mounts and exhaust plus shim rear trans mount up 1/4 inch

Many Ford engineers saw the truck at various drag races(towed Keeling & Clayton California Charger) and finally (1973) Ford made it as a option ---I then got factory engine/frame adapters and this lowered the engine enough that I could remove the trans shim-----could smoke the tires (373 gear) for blocks, got good mileage , lots of power--Ansen gave me me new 8 bolt by 16.5 mag wheels ( out the back door by Louie Senter himself) for it and Caroll Shelby furnished tires for it thru his Goodyear race shop.