Will1971

I purchased a 71 Cutlass S for a parts car and this shortblock was in the trunk. I believe its for an 80 Oldsmobile but am not sure. Any help decoding it would be greatly appreciated.
Casting code is 4790GM5.0LG
The Stamped code is 3GP355043
Thanks

mjrj

Looks like a 1986-1990 roller cam 307 short block.

69HO43

mjrj is correct. It's a 1986 roller cam 307 out of a Cutlass. The G is the model year in the partial vin. Car was built in Pontiac, MI.

joe_padavano

And just to add to this thread, 1980 was the first model year where GM used a letter for the model year instead of a digit in the VIN and VIN derivative. A = 1980, B = 1981, etc. That makes G = 1986.

Will1971

Thanks very much for the information. There were two other other items that were not 7i olds items in the car. The split bench seat is a six way power seat and I assume the bucket seats out of a Pontiac. Could the bench seat be out of the same car as the engine. Thanks a lot to everyone for the information you’ve been sharing.
Will
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Will1971

joe_padavano

The bucket seats are F-body.

The bench does look like it's 1980s vintage.

Will1971

Thank you Joe. Next I need to find the value and get them moved to make space for the disassembly of my car.
Will