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Give Kelly Performance a call. They are the speed shop division of Bill Kelly Chervrolet in Hallandale. They have a dyno though most of their work is on C5s and C6s, they did some work on my '93. While I was there I even saw them installing a blower on a Chevy SSR. I've also heard good things about HorsePower Sales in Pompano Beach. I myself am trying a shop closer to me in the Miami area to do a 383 short block with my hotcam and my LT4 top end. They build race engines and marine engines..I can't recommend them yet as I'm taking my '93 there in a couple of weeks...Oh..stay away from Corvette Specialists in North Miami..descent body work, horrible engine work