I had a 1970 F250 and since we used it for a tow for our top fueler trailer, the 360 was weak but I had a Nascar 427 that I was going to change to but ran across a Lincoln 460 in a Mk2--Installed the whole package----became known as the Devil Truck---Many Ford engineers/race people saw it, talked about it, drove it and they did the 460 package starting in 1973---of course that was after the smog, low compression and retarded camshafts------------