CC Dually LSX

[88RCLB]

If anything I'd go stroker... And if you're going that far you could always take your 5.3 and punch it out to a 5.7.. if memory serves that puts you up to a 383, making a puney little 6.0l small by comparison (364, for those doing the math at home). 6.0s get a premium price so you wouldn't have a TON more into it, but you'd end up with a lot more motor IMO.

There is so much wrong with this. Please stop.



OP: I'd seriously consider a supercharger. Nothing like boost to launch with. A 5.3 with a 4l80 is going to need deep gears to not feel anemic. That first gear really sucks the power launching, but it does have much better spacing once you get moving. I notice a huge difference from a stop getting out of my denali (6.0 w/4l65e) to a work truck (K3500- 6.0 w/4l80e). The denali launches way harder with the 3.06:1 first, vs. the 4l80s 2.48:1, plus the heavier truck doesn't help. I would definitely suggest going with a 4l80 because they are way stouter, just be aware it'll feel like a turd from a stop. It also has a lower overdrive (.75 vs. .7) so add a few RPMs at 70 compared to a 60.

I'm not saying don't do it, I'm just saying I think you'll regret putting a cam/tune into a 5.3 unless you include a whipple on top with the appropriate cam from the get-go.

And it's a good thing you're not too concerned with mileage. Doesn't matter if it's a 4.8 or an 8.1, in a truck that big they suck gas. My 00' with a 5.7 doesn't get any better mileage than any of the 7.4 trucks I've driven, these big trucks just suck gas no matter what.