DYNO disaster ? Help

Before you go getting more radical in gearing and convertor, I'd be looking into what your engine builder did. It's about 40-50hp shy of 375 if the dyno can be trusted. BTW, I rana dyno shop fopr a while. The racier the package, the less likely the dyno will spit out anything you can use. So for your car, a mild package and street stall, it's probably pretty close. This is why I'd start witht he basics. What is the true compression ratio as measured (pull a head off)? What does it have for cylinder pressure (measured before you pull the head)? And what camshaft (part number) was installed? If you dont want to pull the head... Just get a $10 compression gage and the reciept and answer the second two. You DONT need a 4K stall or 4.56s. The engine's soft for some reason.