The motor is in the truck and I am not planning on a tear down so I cant check on the 010/020 designation but will keep it in mind if a rebuild happens in the future.
According to the nastyz28 website (thanks Wrenchbender) the motor is indeed a 350ci. from a 1977 Camaro (as stated by Hotrod Lincoln). It originally had the california emission package (170 hp)...4bbl carb...a/t.
thanks to all for the help...... www.nastyz28.com is well worth putting in your favorites, tons of info on identifing small block and big block chevys

Carl


'58 3600 350/4-sp/stepside/big window cab
'59 3100 235/4-sp/stepside