It was a great truck other than the lack of power . Apparently Ford chose to retard the cam timing and if one adjust that and the ignition timing it really wakes them up .
A friend of mine stumbled across his dad’s original 77 F150 SWB and I helped him restore it . We dropped a reman 460 in to replace the original worn out 400 ( his choice) and tuned it properly. Ran great ! He then surprised his dad on his 70th birthday. His dad literally cried .