I have a 02 Harley that I am building a new motor for and was wondering what stall PI coverter to use.Its a 20 over bore with chromoly rods,patriot ported heads,either JDM or LFP cams(havent decided),stock ported blower and intake,6lb lower pulley,accufab TB,cold air,and Magnaflow exhaust.Thing is I do use it to tow my 18ft trailer and Mustang and do not want to put to much converter in it to keep it from towing.What stall speed do you recomend.