The '80s/'90s 5.0 reverse and std rotation timing covers are same, but are slightly deeper than orig covers from the '70s(related to serpentine setup), 351 trucks did use a timing cover that has a different in flow path from 5.0... I don't know if the 5.0 reverse rotation and 351 rev pump can be interchanged... The '91-'93 T-Bird, '94-'95 Stang and Explorers use a totally different cover from either... Pump for the earlier engines won't fit that cover... This is my orig pulleys on a 5.0 Stang cover...
