i purchased my big bolt last month , after i got it tuned a drove about 15 miles . i discovered a light horizonal crack in the block left side down buy the water drain . any way to repaire this problem ? the engine is a 1948 chevy 217 cubic inch. if not repaireable , i have a 1976 chev 350 to replace it . if replacing , anyone have a good idea how to do this engine swap? thank you 1pete1