I have this same block in my 69 RS Base Coupe; 327 cid/210 hp engine.
The engine in my car is definitely a 2 bolt main. From the references that I have, this block was also used for 302 DZ engines, but in a 4-bolt main configuration. Attached is the info. off of my block:
CASTING NUMBER: 3932386
CASTING DATE: J 31 8 (OCTOBER 31, 1968)
CASTING CLOCK: 8-9 AM, DAY SHIFT
ENGINE CODE: V1122FJ
V = FLINT ENGINE PLANT
1122 = ASSEMBLY DATE, E.G. 11/22/68
FJ = CAMARO, 327 CID, 3 SPD MANUAL
I pulled this engine out of a 3 speed manual coupe, VIN # 124379N551248 back in March 1994. The car was being parted out. I installed the engine in my car last summer.