Help Id Jahns pistons

[deuce5wndw]

Hello guys, I have a set of Jahns pistons and printed on the end of the box is 8-985 RP, FORD, and 3 15/16 std. I have searched on the internet but no luck with that number. I don't know of a Ford engine with a 3 15/16 bore! I looked in a Motors repair manual and the only engine I could find that had that size bore is a 1955 Lincoln 341.Thanks for your help, Dale.