[FWB]

the more i think about it, the more i'm convinced its a 1979 block cast in 78.
an 88 block would have a E(something)TE casting number, for a truck, no cars in 1988 had a 351. so your probably fine using the cover you have, ford motorsports shows their 351 timing cover fits 69-87.....and if its a new build and your not using the factory crank sensor then who cares.......


oh....you have the original cover?....whats the engineering number on the cover? that will finalize what it is...its on the front probably covered in funk