My Shifter knobs are one of my best sellers and I am nearing the 600 knobs mark of sales with these. you will see many of them on the road in Hot Rods and Customs all over the world. I Collect vintage coins and I use bakelite shifter knob to create different and unique shift knobs for the last 10 years. Remember if you didn't buy it from me I didn't make it.
Shifter knobs have a 3/8-24 fine thread and I have a 5/16-24 early ford insert for them. I always tell folks if you want to run it there are many ways to get there for mounting. See mounting tips
Just some ideas, if you really want it on your car you will find a way.
Re drill and tap
Cut a 3/8 bolt and weld it to your shifter arm
weld end of your shifter and clean it and tap new thread
Lokar has a lock out kit to run other knobs (website)