Looking to purchase a one piece oil pan gasket. I can only find them for 79-and-up, 302 Fords. Will it fit on a vintage 289? (Not much difference?!) If not anyone have a source for one that will fit a 65 289?
They will fit (I am using one) but you need to know that they are made to work with a flat pan rail. They are made to work with aluminum oil pans (like a COBRA T pan) that have a machined flat surface for the gasket. They are not desigend to work with a stamped steel pan.
My '91 Lincoln 5.0L HO engine came with a one piece OP gasket and I bought a Felpro replacement one piece unit. OP is steel with the external rails and I noticed the HO OP pan edges are thicker than the flimsy sheet metal OP on a '65 289.
I think it will work if the oil pan gasket surface is flat and if the external reiforcement rails are used. I also noticed the one piece gaskets have a notch in them where the oil dip stick tube goes near the pan (because the Fox cars had the oil dip stick mounted into the driver side of the engine block).