Why is my truck slowly going back to stock?

[SShanks]

On the flywheel end of the engine block is cast 6.0 if its a 6 liter. If it has 4.8/5.3 on it you have to roll a piston to the bottom of the bore and then measure how deep it is. If its about 3-5/8" then its a 5.3L, less means its a 4.8L

Would I be able to see that from underneath? We've kind of have a little competition going for a while so I'm just curious...He's good about sneaking little things in hear and there and b s-ing me. I'd say he's way ahead now since I siezed my motor when I had that STS kit on...

[RedHeartbeat]

nope, can't tell unless the transmission has been removed. Volunteer to help swap the trans and you'll be up under there to check it out and see if you can see the casting number.