do you already have a performance chip for the p13?

most folks just use the p28 or p72 for h-series engines (what i always use) since the editor can adjust fuel/timing tables for what will work.

p72 lack the resistor as well. what rom editing program are you going to use to program the p13, or do you know how to edit using the binary code? p13 are not very user friendly for chipping from what i understand.