Engine decoding

[JR1]

Hello, i could use some help decoding, got two older trucks to learn on, neither has the original motor, first the 69 c20 longhorn, numbers on the pad in front of the passenger head are C97134818 and V1122TFM, 350 from flint?

Next a 75 k5 with a 454 hopefully, numbers on pad in front of passenger head are CEV101201, number on pad abive timing chain cover T0815FBS, B could be a P or R but looks like a B or P, im going to look for the other numbers behind drivers head tomorrow.