Welcome to the wonderful world of tuning!!
Could you beat the stock 700 prior to the kit?
I don't have experience with the EPI kit, but
I would start with belt alignment and belt
deflection. 4800 is a little high in my opinion.
What are your RPM's at top end? 440 ft is short
and I would think you should take both
sleds. Are you sure they are stock?
The best way to test is to have a buddy that
you can run against each time and his sled