'06 5.3

[ROLLDAMTIDE]

ok, first and foremost, let me say that i know absolutely nothing about these modern motors. now thats out of the way, i had a friend call tonight who has a friend storing an engine at his shop. This friend is out of money and looking to unload it. it is a low miles "06 5.3 with ls3 heads, some kind of fairly hot cam, billet chain, and has been converted to run a carb... MSD ignition and a victor jr intake... I have been considering an LSx swap anyway, and this just got thrown at me tonight.... I guess what im asking is.... Jump on it b/c its cheap? or wait and do a conversion after ive dont all my own investigation into such?? I know that i havent given that much information but can somebody give a shot in the dark as to what its worth? Thanks in advance

[ROLLDAMTIDE]

Also, what are the reasons pro/con to convert a lsx to run a carb? (scratching head)... Don't that kinda defeat the whole purpose?

[srh3trinity]

How cheap is it? You can make nice power with a 5.3. I would check into the LS3 heads though, from what I know, the 5.3 motors don't have enough bore for those heads to be effective. As for running an LSx motor with a carb, you are still benefiting from advancements in head design over older SBC's.

[ROLLDAMTIDE]

Less than $1000. I'm going to look at it this afternoon and will find out more.

[garys 68]

The MSD spark unit and intake alone goes for $700. But I'm with Stephen, I dont think you can run those heads with the 5.3 bore.
Btw, go over to LS1tech swap page. You'll find some really big hp numbers with carbed motors.

[daytonayellaz]

Stephen and Gary are right.... You cant run the LS3 heads on a stock 5.3 The 6.0 is the smallest engine the LS3 heads can be ran on. A carbed LS will still be a improvement of a Gen 1 motor, but nothing compares to the benefits of keeping them fuel injected!

Having said this..... based on the info shared... looks like a good buy.

[srh3trinity]

If you get it and it has ls3 heads I might buy them off of you. I have an lq4 and have a set of cathedral port heads but your intake may not work with them if it has the rectangular ports.