Page 483 of the 1957 revision
http://chevy.oldcarmanualproject.com/1929_57chevyparts/57cmpc0483.htm
Pretty clear there, front bushing is 1 3/16".
And no dowels.
This is a press fit bushing, only the slip fit must be dowelled.
My guess is you could use either but I'd have to drill a hole for the dowel.
Buyer beware of the different editions of the parts manual!


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1951 3100 5-window
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