I will second what Nole said about Ping. A real wealth of knowledge. I'm one of the members whose pack was built by Ping and I couldn't be happier. Very professional to work with and takes care of things down to the last detail. It was a very easy drop-in solution. Oh. My cart is a 1990 CC DS with stock 36V motor, Alltrax 500A controller, 400A solenoid, HD F/R contactor, and stock tires. At 24MPH it'll out run every cart in my hood.