Question on 360 crank balance

Hiddentower62 said

he said I needed a neutral balance converter. he said to use the stock flex plate with a neutral balance converter. He also told me the end balanced out at 3g and the front balanced out at 52g, I just had him balance the crank with new rods and Pistons and yes it's still externally balanced.

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There's a lot of missing information here. What con rod and what piston was used? Were they considerably lighter than stock? Yes the front or rear of a crank could require a considerable differance in weight correction. Was "heavy metal" used in the ballance job? Post the blue print of the ballance job and perhaps we (fabo) can help you interpert what the machine shop guy prepared for you.