M1 single plain

I put the duster on scale today I'm at 2940 pounds... I weigh in at 200 even, so with the 4.10's I'm hoping to get someday it would be good, effective rpm range @3000-6000 shifting at 6200, maybe 6300. Maybe i should put down the $450 and get a 318 specific port-o-sonic or single plain by offy... do they still make those?