The Lincoln Y-block has the same 4.63 bore spacing as the FE. But the LYB has a big advantage over the FE in max stroke. Block deck height ( from crank center ) : LYB 10.94, FE 10.17. Cam to crank center to center : LYB 5.152, FE 5.045. Crank rod journal : LYB 2.248, FE 2.438. The most stroke that the FE can take with stock rod journals and stroker profile rods is 4.30. The LYB should be able to take at least a 4.50 stroke.