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FITS MOST 1964-81 CHEVROLET CARS WITH MUNCIE M-20 M-21 M-22 / SAGINAW / BORG WARNER T-10 / TREMEC TKX / TKO TRANSMISSIONS (EXCEPT FOR 1962-67 NOVA). THIS BELL HOUSING HAS BEEN REPRODUCED BY THE PARTS PLACE. THE TRANSMISSION HOLE MEASURES 4 5/8" AND THE GM PART # IS 3899621 WORKS WITH GM TRANSMISSIONS WITH A 4.675" O.D. BEARING RETAINER CLEARS 168 TOOTH 14" FLYWHEELS WITH FACTORY 11" CLUTCH DISCS 1/2"-13 TAPPED HOLE FOR Z-BAR MANUAL CLUTCH LINKAGE, IF NEEDED.
PLEASE NOTE THAT WHEN USING ON A CAR NOT ORIGINALLY EQUIPPED WITH A 621 BELL HOUSING YOU MAY NEED TO PURCHASE STARTER DEPENDING ON YOUR APPLICATION, OUR PART NUMBER FOR THIS STARTER IS 3361870. THE 621 USES A SPECIAL STARTER WITH A CAST IRON SNOUT, GM # 3361870.
Very happy with the product and supper great quality. Thanks