offset grinding crank

[OUTLAW]

Here is an odd idea that I think might work but I want your input incase I missed something.

What I have is a stone stock 74 - 360 short block that is in near perfect condition. This is a low compression motor with flat top pistons in it that are .080 below deck heigth. rather than buying new pistons and rebalancing the motor I thought about having the crank offset ground .080 to end up with a zero deck motor with high compression. To my figuring, since this is a Detroit balance motor and nothing is changing weight from the rods out. With the crank already balanced for these rods and pistons nothing changes there, with the .080 stroke change the same amount of metal will be welded on the journals and ground down back to stock diameter it shouldnt need to be rebalanced. The extra weight( if there is any)would be equal on all planes. Along with this idea is if you have a crank turned down .030 on the rods you don't rebalance so I wouldn't think you would have to this way either. Did I miss something?   

[Chryco Psycho]

probably the cost of welding the crank , Yes I would ahve the balance checked after doing this

[OUTLAW]

I have a guy who welds these things up for my regular machinist who can grind it all for about $200. The problem is that there isn't anyone competent around here who balances cranks . The one shop that does do balancing has a crappy reputation

[moper]

Well, for me to have a crank welded on 4 throws, and then offest ground which includes truing and indexing, costs about $600. If they add radiused fillets, it's more. You will still need it balanced. The weight you add is added further out on the throw, and none is added to the counterweight, so it will be heavy on the rod throw.

[OUTLAW]

my reasoning is that yes the weight being changed is .080 further out but it is being changed radially the same amount all the way around. And since you don't rebalance after grinding to make the rods .030 undersize that you shouldn't have to re bal;ance when offset grinding .Also this is a Detroit Balance engine which can be as much as 7 grams off  from the factory.

But yes I agree this is not the optimum way to go about this but it looks to be a feasible way. To weld the crank up is about $200 and to offset grind it will be about $120. (A plus side is my crank is -.010 now and this will also bring it back to stock).
pistons...$240
bore...     $160
balance..$250
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   $650 vs $350

this seems like a feasible way to go from a 8.4 compression motor to a 10.7 aprox without getting too deep into it. Remember there isnt anyone locally who can balance worth a damn.So this would probably be a better balance job than a bad balance job with the extra expense