If you are saying that the fork column (from bottom seat to top) is 35mm longer than the head tube then you may be OK. the top 1mm or more of a headset nut is not threaded anyway, so you are probably only losing a bit more than one thread, and you will have enough for sure if there is a non-keyed spacer that can be removed. What would be helpful to know is the stack height without the locknut. That will tell you how many threads will be available, roughly 1 per mm.