Hello, I put 5.3 in a 71 chevy truck. Looking for advice on mufflers. Flowmasters are too loud and I have Dynomax on another truck, but still too loud. This will be my work truck. It will have dual exhaust run to he back. The mufflers will be in the front /bed area, outside the frame. Do not want resonation at cruising speed. Any tips? Thanks a bunch, Alan