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I'm not at all familiar with the '52 3100 frame, and clearance issues but I bought these Hooker LSx cast iron headers for my '98 Camaro LS1/4L60e into my '67 Chevy C-10 and they work with no issues.
http://www.ebay.com/sch/i.html?_from...aders&_sacat=0
Might be worth doing a little research on them for your application....
Oh, and welcome to the board!
LockDoc