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Axle-crown length is the length between the axle and the top of the fork crown, increasing or decreasing it pivots the bike about the rear axle and affects your headtube angle (amongst other things), increasing it decreases the head angle and vice versa.
As I said, a few mill either way won't make much difference. If you buy another "track" fork, it is likely to be a similar length/rake so won't change the handling. I'd just get another fork and fit a brake on it to get you going.
oheyitsd
Thanks for sharing this information!
What do you mean by matching the axle and crown length?
Yes I had thought about getting the current fork drilled but I’m really not sure there’s enough real estate to accommodate it! It’s hard to know