There are no diferences between Cutlass and 442 etc. The difference lies in whether the car has a big block (400, 425, 455) or a small block (330, 350, 403). The big blocks have higher (1 in.) deck heights. The tube diameters are different between the two as well.
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Oldsmobile Specialist, but restore most makes 1949-1979. Dealer for Best Gasket Co. and Victory Performance Parts. Member Oldsmobile Club of America (#013935), Oldsmobile Club of Wisconsin (President 1991-2002), National Antique Oldsmobile Club (#3923), Falcon Club of America (#12382), and Wisconsin Mopar Muscle Club (#133) E-Bay I.D.: twjoyce. Courteous, honest service, 40 years experience. Tom Joyce 262-886-9806 joycebrosrest@wi.rr.com