I stole this info from a site that did a T-5 conversion into a Monte Carlo
To the best of my knowledge, the following are the only bellhousings that will work with the factory 1978-1981 A body mechanical clutch linkage:
1978 A body (casting 464697; ) for 168-tooth flywheel; Chevrolet; use with clutch fork: GM 14007356
Positive identifiers: casting 464697, lowered clutch fork ballstud, and 697 cast onto inside clutch fork ballstud boss
1978 A body (casting 469697; for 168-tooth flywheel; Chevrolet; use with clutch fork: GM 14007356
Positive identifiers: casting 469697, lowered clutch fork ballstud, and 697 cast onto inside clutch fork ballstud boss
1978-1981 A body (casting 462606; for 153-tooth flywheel; Chevrolet; use with clutch fork: GM 14007356
Positive identifiers: casting 462606, lowered clutch fork ballstud, and 606 cast onto inside clutch fork ballstud boss
1978-1981 A body (casting 563441; for 153-tooth flywheel; Buick-Oldsmobile-Pontiac [BOP]; use with clutch fork: GM 14007356
1982 V8 F body (casting 14037657; for 153-tooth flywheel; Chevrolet/BOP; use with clutch fork: GM 14037647
1983 V8 F body (casting 14060627; for 153-tooth flywheel; Chevrolet; use with clutch fork: GM 14037647
1984-1988 Corvette (casting 14048867; for 153-tooth flywheel; Chevrolet; use with clutch fork: GM 14066235
Lakewood Industries 15015 for 1982-1983 V8 F body use with clutch fork: Lakewood Industries 15500, GM 340278, or GM 14066235
To the best of my knowledge, the following are the only bellhousings that will work with the factory 1978-1981 A body mechanical clutch linkage:
1978 A body (casting 464697; ) for 168-tooth flywheel; Chevrolet; use with clutch fork: GM 14007356
Positive identifiers: casting 464697, lowered clutch fork ballstud, and 697 cast onto inside clutch fork ballstud boss
1978 A body (casting 469697; for 168-tooth flywheel; Chevrolet; use with clutch fork: GM 14007356
Positive identifiers: casting 469697, lowered clutch fork ballstud, and 697 cast onto inside clutch fork ballstud boss
1978-1981 A body (casting 462606; for 153-tooth flywheel; Chevrolet; use with clutch fork: GM 14007356
Positive identifiers: casting 462606, lowered clutch fork ballstud, and 606 cast onto inside clutch fork ballstud boss
1978-1981 A body (casting 563441; for 153-tooth flywheel; Buick-Oldsmobile-Pontiac [BOP]; use with clutch fork: GM 14007356
1982 V8 F body (casting 14037657; for 153-tooth flywheel; Chevrolet/BOP; use with clutch fork: GM 14037647
1983 V8 F body (casting 14060627; for 153-tooth flywheel; Chevrolet; use with clutch fork: GM 14037647
1984-1988 Corvette (casting 14048867; for 153-tooth flywheel; Chevrolet; use with clutch fork: GM 14066235
Lakewood Industries 15015 for 1982-1983 V8 F body use with clutch fork: Lakewood Industries 15500, GM 340278, or GM 14066235