Does anyone know of a company that produces a tubular k-member for the '67-72 trucks? Or at least someone that can fabricate one for me? Thanks.

I would go to a local race shop or speed shop and ask about who does fabrication. Shouldn't be too hard to find someone who could make one in Oklahoma City. I've never seen one offered by any company.

BTW, can you post a larger pic of the engine - looks awesome!