17 and in need for power!!

Yeah think about what you really want to achieve and DONT be impulsive and start adding things to the 6 and start accumulating the parts for the 340/360 you want to drop in the car. There are a lot of things you will need in order for that to come together correctly and give you the desired achievement. Look into the parts needed to do the swap, it can get expensive really quickly. So make your list and calculate the costs. What type experience mechanically do you and your father have in order to do some or all of the needed work to your car? By the way that's a sharp looking car! Keep us posted and if you need parts let us know, someone here should have what you need. Another note for you to save a bit of cash is to try and find a 360 engine they are more available at good prices.
Here is a good read to help you along....
http://www.engine-swaps.com/