If I understand your question you are wanting to convert from column shifter to floor shift. I suggest you google floor shift conversion kits and see what is on the market. The majority of those conversion shifters were marginal at best. I have one on my 1962 C10 and it’s reliable but sort of sloppy. I believe it is a Mr Gasket brand.
This thread should probably go to the HiPo forum since it deals with a modification from stock, but I will leave it here for now and see if more answers follow.
