I'm looking to put either single or dual exhaust on my 1981. Either way, I'm going to get stainless. I'd like to know what'* decent in the way of high-flow catcons, and mufflers. I've heard Borla is good. I'm also thinking about a stainless Thrush, with the intention that it stays relatively quiet, but still sounds great (maybe something around 30"? I have a 26" Thrush on my '94 Blazer, and that sounds beautiful at idle...but a bit loud at mid throttle and so on. Basically aiming for something that'* quiet, sounds nice, and will increase fuel economy and power.