So, I won a $500 raffle at *********.com, I'm trying to decide what I want to do.

My current mods are in my sig.

The things I had on my mind are: Kinetix HFC's, UR Crank Pulley, MREV+ and 5/16 spacer (I already purchased the MREV+ though), and 3.9 final drive.

I have to choose from the vendors on the *********.com site, so I found:
Kinetix HFC's
UR Crank Pulley
5/16 Spacer

Now, I can't find the 3.9 final drive on any of the vendor's sites, so I guess thats out of the question.
But my big question is.. well.. what should I do? I'm trying to figure out what would be most affordable in the end - what should I buy used elsewhere, and what should I get with this $500 credit? Also, is this a good future-mod list, or should I forget about something..

 

out of those 3?

pulley and spacer..

 

I'm assuming you are mt, so revup. If that's the case, you definately want the spacer with your plenum. Between the other two I could go either way, but would probably go with the hfc's just to finish off your exhaust path, unless headers are in your plans later. You'll ended up spending a little of your own $ that route, but it wouldn't be much.

edit to add: congrats on the raffle win btw.