Nickelplate wrote
Thanks, guys! I actually managed to just use the stock stuff. There is about 2 degrees there where it will actually all fit together. So I guess officially, this will all fit together.
I ended up getting all the serpentine stuff from a 1994 put on my 1986. Then I started to put the coolant back in and it started puking out the back of the new style water pump. I didn't realize that the timing covers were different, too! Oy vey. Guess I'm taking it all back apart now. xD
The quick fix for this is to order a 1987 Mustang GT water pump. This is what I did (I'm running a 1996 F150 serpentine system on my 302, which is the same as what you have, I believe 1994-1996 were the same). I ended up not needing the Mustang water pump as I eventually changed the timing cover to a later EFI cover, but if you want to leave yours on and just swap the pump, the Mustang pump is the ticket.
I don't know the full history, but for a few years...1985-ish to 1987, Mustang 5.0 GT's still had the old carbed timing covers but also had serpentine belt systems with reverse rotation water pumps.
They had round ports instead of the elongated D shaped ports, so they could be installed on either rotation timing cover.
1952 Mercury M-1 Pickup '96 5.0/4R70W swap project...
1984 F150 4X2 Flareside. Mild 302 w/ 5spd. Sold.
1980 F150 4X4 Flareside. 300i6 w/ 5spd. Sold in 2021.
1980 F100 4X2 Flareside. 351w/2bbl w/NP435. Sold in 1995