Sell the 420a and get something turbo and awd. Depending on the condition and stuff of your GS, you could sell it and either pick up a 2g GST or 1g AWD. Being a 2gB will get you a little bit more money. Good gas mileage cars are in high demand these days lol.

So, sell that then look around at your options. 420a's are not good for power at all.