Rod - motor options for 1972 were the base 350, LT1 350 and the 454 BB. I'm sure if you had an original LT1 it would still be in the car, so let's go with the base 350. Your base 350 should be a two bolt main, but it might be worth pulling the oil pan to make sure. The base motor and the LT1 used the same block, just machined differently for 2 or 4 bolt mains. If it is original and complete minus the carb the best $$$ would be to someone that has a '72 with a blown or missing motor. If the casting dates are correct, it would be valuable to someone to do a VIN re-stamp or a restoration motor, $1k plus to the right person. To your buddy with the jeep, a corvette motor may be cool even if it's only a two bolt main, I would put a value to him at $1k or lower depending on how good of a buddy he is. The heads from your original motor have some value on their own. According to my Old Black Book, the base motor and LT1's shared head castings 3973487, 3998916 in some instances. If your heads are either of these, they may be valuable to any '72 LT1 owner with a bad head. The third 350 head option for '72 was 3998993. This was a base motor only head and not too valuable except to the first option I mentioned above. Hope this helps. The $$$ are just my opinion and may vary depending who you sell it to. Personally I would verify the mains and the head castings before doing anything. Good luck !!
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John Sigmund
valkman57@sbcglobal.net
NCRS Member 61302
NW NCRS Chapter Member
Duct tape is the new Black !!