I'm not sure if they can help you out at all, but I had an issue with a local engine company here about 15 years ago and to where I contacted the Better Business Bureau (BBB). The company was in eastern Washington, of which I bought a motor from them for my 1965 mustang and they claimed it would have 400 hp. I installed the motor in the car, drove the car, yet it didn't seem anywhere near 400 hp and it seemed like it just stalled out around 3,500 rpm. I took the car to a chassis dyno shop to see what it was actually putting out for horsepower, which was 273 hp at the rear wheels, which equates to around 310-320 hp at the motor. On the computer, it also showed the horsepower and torque figures flattening out after 3,500 rpm, meaning that the company installed the wrong camshaft in the motor as typically on a street car you'll have something that makes power up until 6k rpm or so. I voiced these issues and complaints to the company and they pretty much told that me I was out of luck. I contacted the BBB and long story short, we ended up going to arbitration over the phone and they sided in my favor after I showed them the dyno sheet as well as the notes from the dyno shop about how the motor wasn't what I should've gotten from the company. On top of that, I also sent them all of the email conversations back and forth with the company about how they wouldn't help me out at all.