Wrong size shoes?

[ClydeBuilt]

Dug out my old D4 Cyclone and Im finding the front wheels locked up!

I actually thought I had blown the diff or something last time and that was ages ago. Whipped out the front diff and its fine, its when the wheel nuts are back on that it locks up?

So.....wrong wheels, wheel nuts?
I ran it a couple of times at a local club as I said and changed nothing, I was aware my tyres werent doing it, so maybve Ive swapped them over on something and forgotten all about it....a 'senior' moment my son calls it!

Any ideas?