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After you find out the info on the engine, pull it anyway and make sure. The "J" heads need alot of work to be just OK. My opion is get the E-brock heads. Out of the box better off and 50 lbs lighter. Next would be pretty much any of the iron heads. Letters A, B, C, G, Ga. Most think "C" the best bet. But with port work and big valves any one will work.
If you are going to use the stock pan, use only the standard pump and make your mods to the oil sys. If you go with the 7 or 8 qt. pan be sure to use the HV pump with the big pick-up.
Be sure to use a name brand timming chain set, and dial the cam in. Check with one of the "OLDSMOBILE" venders that deal with the OLDS engine.
Like what was stated the 4.88's have to go. 3.73's for a street car. 3.90 or 4.10 for racing. 27", 28"tall tire = 3.90's 29", 30"tall tire 4.10's
Also, depending what your plans for the car is, a better stall speed convertor would be a good investment.
Gene
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