I know this is one of your older messages, but when I saw it I wanted to ask you if you still had any of the floor shifters you mentioned. I have a 51 F1 that my Dad bought brand new. And, I'm wanting to change it from a 3 on the tree to a three by the knee. I just started going through the pickup, but it doesn't need much as it was always garage kept. It has been really difficult trying to find a floor shifter and stay with the stock transmission. If you don't have one I can buy from you, I'll go with a T5 out of an S-10.
Thanks,
Greg V.