I got the bolt in lower firewall of the 37 out and I decided to weld up all the unused holes in them, the smaller holes can just be welded up but the larger ones need plugs welded in. Any suggestions on how to make some round plugs? The metal is 16 guage.

Also should I weld with my Miller 35 and .035 wire or my Miller 110 with .023 wire? I'm using argon/C02 mix for gas.

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69.5 A12 Bee, first purchased in 1976, car 169 on registry 69 Coronet R/T 440/4 spd 69 Coronet 500 Conv H code 383 4bbl/auto 37 Plymouth PU Find your spot on earth and ride it.