How much power does my coupe have?

[Mont]

I agree with saleenGTS and mustang17, your heads are killing power at all RPM and you need a set of headers and gears too. I have GT-40x and I need bigger heads. I can't even think about small heads on a 351. Everything else looks good in your sig, if you have heads and headers and maybe a cam that you know the specs on I bet you would be in the 350 to 400 range

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89 LX Supercharged DSS 357, 11 lbs Powerdyne, Downs Box intake, ported GT-40x heads, lockwired, Crane Cam 1.6 rockers, Crower cam, Oil cooler, Moroso oil evac kit, Taylor 10mm wires, MAC 70mm T/B, 30lb injectors, Vortech fuel rails, Pro M 75mm Mass air, Vortech T-Rex Fuel pump, 255lph intank pump, K&N, Cobra R radiator MSD6-BTM, Lakewood bellhousing, Tremec Trans, Pro 5.0 shifter, MAC headers and X-pipe, Dynomax race mufflers. Dyno at 556hp to the wheels.