Why is my truck slowly going back to stock?

This time one year ago I was running an STS rear mount turbo kit on my 2006 Silverado 1500 with a 4.8L engine...I was only running about 5 pounds of boost so it was nothing special, but it was so fun. After about 2 months the turbo was holding up fine until one day i was driving, got on it hard, then the engine just died while moving; got out, checked the oil, and it barely registered on the dipstick...somehow a fitting on the oil supply system for the turbo leaked all of my oil out slowly and I never caught it. The engine was seized, I got it fixed for about 3 grand, and sold my turbo to help get my truck running again. Now I'm basically driving around a stock 4.8L silverado with no balls. I'm afraid to do anything crazy because the dealership fixed the engine using the "cost effective" meathod so needless to say the engine makes a slight knock still...What do you guys think I should do for performance? Scrap the 4.8 and go with a 6.0 or something...or should I just go through the 4.8 with a fine tooth comb?

Do a 6.0L LQ4 engine as a start and then boost it later.

How much does a typical 6.0 engine swap run?

whatever your donor engine costs - sale of 4.8 + tune cost

Is it better get a crate 6.0 or just look around my area for one? I've got a friend that put a 6.0 in his silverado and said it was pretty easy...said it basically fell in place and plugged right in...I think he said it needed a new flexplate. Sorry I'm asking dumb questions...I guess I'm learning on my feet. I was in a wreck last night at my towns cruise night so I should really be focusing on body work versus doing an engine swap. Lol! Some crazy lady flipped a u-turn right in front of me...clipped my passenger door and rear quarter pannel pretty good...

Dude, fix the body first. See if the insurance company is going to try to total it first. If so, it may be best to let them do that and gain some $$$$ out of the settlement before doing a swap.

Well, it's definitely not gonna be totaled out, but it definetely needs some work. It blew out the sidewall of my tire but I don't think it hurt the wheel. Maybe I'll get lucky and it won't ballance and I can get a new one...I've got another question...I've got the tune still on my truck from when I had my turbo on...I also still have the larger injectors that came with the kit on...is it safe to run 89 octane in my truck with the tune still on or should I take it off? I've been putting 91 in it but it's 20 cents higher a gallon...

eBay Motors: LQ9, LS1, LS2 GEN III 6.0L SHORT BLOCK (item 150257008558 end time Jun-15-08 21:35:37 PDT) here is a LQ4. it says its a LQ9 but its not. Look on ebay. a short block is easy to find cheap. then buy some nice heads and intake.

The tune has to be awful running N/A. Get it retuned with the injectors taken into consideration. Do it once you get the new engine in and be done with it. Do you have a nelson tune?

If you get a 6.0 find the cheapest one you can get your hands on, then rebuild it your self. TRUST ME