In Reply to: non pressurized cap posted by Robert Angney on September 02, 2020 at 12:20:33:
Do you still have the old cap? They can be rebuilt with a kit. The cap is the STANT chromed radiator cap and OEM used ones pop up on ebay a often. No, you can't use the other one, won't work. The opening port is not the same size and the tangs are reverse. The good news is there is a kit to rebuild the OEM cap --- p/n B-8100-RK, about $25. Carpenter, Just8's, Brattons, other Ford suppliers sell them. Early originals were brass with chrome plating. I had a few but think I've sold all the extras I had.