Well I've worked it out. I can't achieve what I want. There was a racing tire for Porsche Cup front wheels that will work but Dunlop doesn't make that anymore. Aside from that nobody makes a 19 inch wire wheel that goes on Jaguar spline drive.
Now I'm forced to decide if I want to accept 15 inch wires ( I've got a set ) with 6 inch rims. Or, Compromise and buy a set of mag wheels. Which sort of defeats the whole idea.
money other idea is Recreate the Black Jack only use the V12. Except then all that MG stuff will go to waste.
I've got one more complete car in me. I don't want to make a mistake or have regrets.