From Hollander's 54th edition Interchange Book:
CMJ:
8-305 4BC 155HP
(VIN "H")
LG4 eng.
Chev. Pass. '80

CMJ:
8-350 2BC 145 HP
(VIN 75"H" & '76-'77"V")
L65 eng.

145 hp? Could this be a mistake?, Im not doubting youre knowledge i just wanna be sure. I know they reuse suffix codes sometimes.
The above says 76-77? the description i found on mortec and nastyz28 says its a 74 block?
I made a mistake on the 4 bolt thing it was actually 4bbl
Ill go there again tommorow and get the block casting #will that help to identify?