OK basically I got an 03 Monte Carlo cheap as hell...its an LS tho and Id like to either turbo/supercharge it. My friend found an 06 SS engine that looks like it would work fine for 1 grand. I'd have to put maybe another grand in for mounts and other odds and ends. I was told if not the new motor I should get a supercharger cuz I have a high compression rate. Im liking the new motor ideal but I wanted some other opinions.

My motor:
V6 / 3.4 ltr / 55k miles

New motor:
V8 / 5.3ltr / 9k miles

So whats better in your opinions?
Turbo?
Super?
New Engine?

Thank you for all comments and help.