Trailering a 94 265 Fiesta Vee

I purchased a new tandem trailer for a 94 fiesta 265 that I will be trailering next week. The trailer has two bunks and I was told by the salesman that there is a 50% chance that I will need to adjust the bunks for propper seating of the hull. Would anyone know the approximate space required between the two bunks for this size boat? I can take the winch off at the boat ramp and quickly reattach it to the trailer while the boat is on the trailer - I just don't want to keep loading and unloading the boat on the trailer and loosening and tightening about 32 nuts while it is so cold.

Any help would be (of course) greatly appreciated.

Mike