hey Steve.....
there are a few things to consider... is it just going to be raced at the post classic association races or in club racing too? if it qualifies for another formula class... you can choose what number board you prefer.. ie. Pre89 400 qualifies for F3 and Pre '89 jnr...
check out MNZ's website which has the regulations for number board colours....
mnz.co.nz
most people keep their MNZ allocated number so dont change them.
We usually use vinyl backing then vinyl number as its easier to apply, repair and reapply
if you chose a posty number... you need to get it allocated by the post classic association.
if you choose a MNZ class race number and class... you can call MNZ and see what numbers are free and choose one
hope this helps and look forward to seeing you at the track!
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