37 deg of advance isn't far off of what the distributor will give you, so it should be ok. Or at least close.
Have you checked to make sure that you are getting what you are asking for? So if you request 10deg, you are getting it?
Check your marks on the flywheel, and use a light to make sure you are getting what you are asking for.
Other than that, at WOT (assuming the carburation is correct, and the throttles open up all the way), 37 deg of advance is about right.
Part throttle, OTOH, you can advance that to get better mileage- experiment with part throttle settings.....