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I have 2 good frames --1 box frame -- 1 reg frame ---57 2 door ht belair--- I was told the box frame is better. what are your thoughts? --- going to build a driver -- mild 327--5 speed--336 rear gears
 

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Inspect them both for stress cracks but if none are present then either is just fine. The so called "OnePiece" really isn't a one piece frame but will take less effort to clean up, so to speak.

JMHO
 

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RIP: 10-27-2018
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The so called one piece frame is welded up from box tubing endways, whereas the two piece frame is welded up from two C channels.

Just two different GM suppliers. and it has nothing to do with California.

IMO the two piece is stronger but the neat freaks like the one piece cause its easier to make smooth and pretty. Ive seen alot more rusted out one piece frames than two piece.

To me its much todo over nothing, but others differ.
 
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