I used the following shops when I lived on Long Island and was extremely happy with their works:
Vinny Ten Racing at 100 Dale Street, West Babylon, NY 11704
TKX Performance at 130 Railroad Street, Huntington Station, NY 11746
Vinny has a dyno in his shop and is a great tuner. He is an accomplished drag racer and fully understands racer's needs (like I need it done by tomorrow or I will miss my race!) and accommodates them. He is a good engine builder, too.
Taso (the owner of TKX) is a great mechanic and fabricator. His shop can fabricate exhaust systems, too (TIG welding). He is also equipped to perform alignment and corner weighing.
If you decide to contact them, tell them Sho sent you.