Laysons vs hookers

I have a 64 Dart with fenderwell headers (forget the brand) and I wish I didn't have them on the car. One of these days I am going to talk them off and put manifolds back on. The car never gets above 3500 rpm. I have 2 1/2 inch dual aluminizied pipes runing to the rear. Way overkill for a stock 273. They will be coming off too and getting hung on the wall or sold.