1250 is Gasket for the 170 Heads.
Try triming the area on the lower ends of the intake gaskets. The section of the Intake gaskets that match up and fit sinto the lip of the exposed headgaskets until they line up.
Try triming the area on the lower ends of the intake gaskets. The section of the Intake gaskets that match up and fit sinto the lip of the exposed headgaskets until they line up.