69 threw 79 , 2 or 4 bolt and could be up to 370 hr depending what heads and what it came out of.
What Year Is My Chevy 350 V8 Engine? #3970010
69-80 2 or 4 bolt main, you can get closer with head casting numbers, go to mortec.com
8900100
Casting Number cu. In. Years Notes
3970010 302 1969 Camaro Z/28 - 4 bolt main bearings
3970010 327 1969 2 bolt main bearings - trucks
3970010 350 1969 - 80 2 or 4 bolt main bearings
3970010 302 1969 Camaro Z/28 - 4 bolt main bearings
3970010 327 1969 2 bolt main bearings - trucks
3970010 350 1969 - 80 2 or 4 bolt main bearings