If you want opinions regarding
"I am not affraid of a challenge, but wondering how hard it is gonna be to find the parts I need", post what you need and you'll get a few responses/opinions.
There was/is a person who has posted that he made/makes 47-55 Suburban seat frames - maybe someone will post a link to that discussion?
Does
"kinda bought" mean you stole it, or you still owe something on it, or that you have not finished negotiations?
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thread discussing reproduction seat frames