1925 Flat tank Carb problem

[scifi]

Hi Guys, I have a 1925 BSA Flat Tanker, which has a brass AMAC carb.   I was out riding the local lanes and had to stop for a tractor blocking the lane.   When I tried restarting, it wouldn't.   The carb felt really hot, so it could have been a vapour lock problem.
Would it be considered Ok for me to change to an AMAL GP carb, which has a fibre spacer for the stub mount..?   Or should I keep the original (needle-less.) AMAC..?