Is there any difference between a 68 G.T. Galaxie 428 Q code & the 428 P.I. S code engines ? --Thanks,---S.
I assume by PI S code you mean PIs that were put in Mustang chassis with the S VIN designation the answer is yes. The Galaxie motor wouldn't have the reinforced block, C7AE rods, 390 GT cam, 14 bolt heads, aluminum intake...............