I got those numbers off the pad cast on the passenger side front of the motor. I'll get the other numbers and see if I can match something up. I scrubbed the above numbers and I'm pretty sure on them.... just that I can't find them listed on any sites. I've tried moretec and numerous chevy forums.
there should be a two or three letter or number code in one of those groups on the pad to the left of the water pump on the deck. something like TXV,ZAF,GL,T5G,D6A prety much any combo you can think of. the casting number on the rear of the block will only tell you size and year, the code number or suffix code on the front will tell you, year, displacement, vehical model, horsepower, original transmission,induction type, and a few other things.
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