I have 97 gt with 22,000 miles my mods are vortech s trim supercharger,svo headers,h-pipe,dyno-max exhaust, kenny brown coil-over front suspension, brembo brakes, 3.73, maf 77mm, alum driveshaft, steeda springs. What should be my next step looking for 400 horsepower with stock block.
You would benifit a lot from a pi swap. Problem with that is higher compression. If I were you , I woukd look into a set of good blower cams for the npi heads. Mhs or cushman motorsports .