Yep, done the same with my '59 389 block - welded the valley up, made a mains girdle,fitted longer mains cap dowels,dry decked the block and heads, honed out the lifter bores to SBF size( 'cos the valley welding distorted them),3/4 filled the block,drilled out and smoothed all the oil galleries,restricted the lifter bore oil holes, and had the block bored,honed and decked ! Actual money spent wasn't too bad as I did 90% of the work myself, but if I factored in the amount of man hours involved........, I could have easily bought an aftermarket block.
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