The 2.3 in race trim will tolerate 36-38 degrees total advance. The best (my opinion) is to use a modified distributor with total advance only...no vacuum or advance weights working.

It will start well, idle well and provide good spark with no reliability issues. The KISS system at work. TFI is the best bet...use only three of the existing wires from the distributor...just wire and run. Time it at any place in the rev range.

Good Racing.

Bill