My advice? Why fix what ain't broke? ABS makes good stuff so mods might not be in your interest.
If you want to experiment with an offset vertical, then try building one or buy a cheap brinkmann square vertical and add a fire box to the backside.
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18.5" OTS, 22.5" OTG, CB Silver(Rip), Vintage Coleman Bullet, Pit Barrel, UDS
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