Hi Guys, I just bought a running chevy 6 engine to replace my frozen 54 in a 49 truck. The problem is I don't know what engine I have and it is not listed in the liners. The numbers are:

Head- 3835913
Front engine- 38358
Back engine on boss. 0062295F55P
Back engine under starter: G0N4CF14 (the G may be a C)

Any help????......Thanks!!!