DR8907

I've just nailed down another job for the summer, and I'll be making about $1000 every two weeks mostly in cash. So I should have a decent amount of money by the time school starts up again. I'm not sure what I want to do with the money I make over the summer though. At first I was thinking spend it on a nice second car for the winter and still have alot left over (I live in MI). Now I'm looking at buying a new 351W block and starting a build. Problem is I don't know all that much about buying a block, so I could use some advice. How much would I be spending... where should I be looking... ect. Thanks in advance.