not sure i understand the question.
if you have a suspension fork on the bike it should still be 26". the landing gear are the same size.. 26", so your bottom bracket should be the same. the crank arm length should be 175mm. (if you kept the original humu cranks)
its the landing gear steer tube that might be an issue. its short. or at least mine is. wish i had another inch or so.
do you have a pic of your humu?