Well I've pulled plenty of engines from the pick and pull but have rebuilt every single one. For my 69 firebird, I grabbed a 4 bolt main 350 from a truck, grabbed the crank from a 400 block from a truck and some nice vortec heads. Built a very nice 383 stroker that kept breaking axle shafts..... Still, most of the engines I've taken apart that I pulled had oval shaped bores and cracked heads.... Luckily I have a very close friend that owns a machine shop that takes care of me, he even takes the cracked heads and furnace brazes the cracks so they are like new.
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