[Mr70]

I'm not certain,but think the designated "2" revision took place sometime after Dec.69 due to an internal circut board re-design.
Technically the 1970 Camaro should've come with the std. 01FPB1 F-Body labeled radio,which they did make.But because it was a late produced vehicle,most early 1970 records include it with 01APB1 or 01APB2 radio used on the 1970 Chevelle-Monte C.-Nova-Acadian as a default code.
Personally I think either the 01APB2 or 01FPB1 radio was possible for your assembly date,as I've pulled a few PB2's out of some certain 70 Camaros in the past,but not sure if they were assembly line or service/customer installed.
The std. 1970 Pontiac Firebird AM radio had a similar body design,but with a different face plate & would've been labeled 02FPB1.
The 1 designated Chevrolet,2 Pontiac.