GM head casting numbers. I cant identify them. Please help.?

brandon

New member
I bought a used BF Goodwrench 350 motor from a friend for the lower end and the block. (cracked 3 pistons and my block on my 355). I have no intentions on using the heads but I can not figure out what the heads are. For starters they are miss matched. If anyone could help me figure out what they are that would be great. They do appear to be the camel hump heads with 2.02 valves but I would like to know what they are for sure before I either sell them or work them and use them for another motor.
Here are the casting numbers:
3998999
3988993

I will try to get in touch with BF tomorrow and see if they have any record of this motor but maybe someone knows what these are.
 
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