Spent yesterday evening making up some 60's style wheelie bars, I did a bit of searching around and got contacted by an old gas racer from the 60's who gave me the info i needed.
I started with a pair of 5" OD steel wheels with a rubber tyre that i found on ebay, then my mate Mark Bull donated a pair of 1956 International truck springs which i cut 3" behind the centre bolt.
Next i plasma cut a axle mounting bracket from 3/8" plate and used 56 Chevy truck U bolts to clamp it together.
I'm pretty pleased how they came out !!! Just hope i don't need them !!!