Roskoe,
Glad you ditched the fat chicks.
The best performance mod that will also make it smoke is to add 10 gallons of waste motor oil to the fuel take and put two sheets of notebook paper over the stock paper panel air filter. If you have an aftermarket performance intake, you need to cover 90% of it with duct tape instead of the notebook paper in the stock airbox mod.
You ought to be able to get a pretty good puff with those two modification. If you want more power than that, your going to have to try the burning oil and tires in the bed modification.