buying a convertor

I have used Dynamic and Turbo Action. The Dynamic was a $300 off the shelf 10" that worked well behind my 440. The Turbo Action is a 8" that flashes to 4200rpms and was custom built for someone elses car but worked well with my. Im going to send the T/A back to be freshend up and updated. Its 20 years old and for the $450 they charge for the update it beats buying a new $1000 converter.

Like Chris said, most converter companies will be fine if you give them accurate info. Dynamic, T/A, ATI or PTC would be my choices though.