If you don't know it by now- 99 5.3 all bolt ons 180 stat-94 sunoco.
Playing with this Predator.
I have gotten the kr down to below 3, at wot. I'm thinking I might even have some false knock because it doesn't show up till above 4000 rpm and then spikes.
Before the custom tune I saw 8points from imediatly mashing the gas so I know its getting better.
I reduced spark by 5 and bumped fuel 2.5.
What is the cost of reducing spark? the predator allows up to -10. I didn't make it to the track this weekend but the weather would of been perfect for it.

On a better note I have passed the 500 mile mark on the eaton posi and 4.10's. I'm really happy with the way the truck feels. I run out of road before I know it.
if your looking for gears I got evrything at
www.randysringandpinion.com salesmen Matt

http://photos.yahoo.com/creederado