I realy don't see a need in you converting your mount. most of all the 73-early eighties trucks only had one bolt on the mount. But to anser your question, you can convert it to a 2 bolt one by buying a new mount. I can drill it for one or 2 bolts whichever you prefer. Just let me know.
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If it aint got t*ts or wheels I am not interested!!!!!!
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