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Old 03-27-2005, 07:46 AM
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boxing frame on '33 plymouth sedan

A friend asked me if I thought he should box in the frame on his '33 Plymouth
4 door sedan. I have not had any experience with frame boxing, so I thought
I would put this question out there for him. It has mustang II front suspension
and a Chevy small block. He is also thinking about switching to an early Chrysler hemi. He is not sure if the stock frame will be strong enough. Any
input from some of you that are knowledgeable in this area would be greatly
Thanks, Nomadbb

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Old 03-27-2005, 08:06 AM
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If it were mine, I would fully box the frame. The original frame was not designed to handle the HP and torque of a small block Chevy, let alone a Hemi.

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Old 03-27-2005, 10:44 AM

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All MII kits provide the boxing plates for the front end and should be used. Any other boxing could easily be done in the area of the transmission cross member and rear suspension mounting areas if desired. The 33 plymouth frames were very well over designed so I would not concern myself too much unless it is going to be hammered on a regular basic with a lot of HP and torque.

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