Been working on a 70 340 cuda project for about a year had the non original 340 block in boxes with new edelbrock head air gap intake new pistons, Got a friend of mine that been assembling mopar engines for 30 plus years assemble the engine. had a few questionable areas with freeze plugs hole etc with the block. got it broke in and racked up 1250 miles on it using zinc add oil and 80lbs of oil pressure at cold idle, had a very slight antifreeze leak into exhaust would come out of exhaust...
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