Ok so I'm just waiting on my income tax to get started on this but can anyone either refer me to a link or tell me a simplified (if possible) way to
UPGREYD
my lifters, rocker arms and push rods?
If I'm going to do the above, may as well go ahead and
UPGREYD
the valve springs as well?
Fixed it for you.
Seriously, though, you didn't bother to mention how many miles it has on it.
If you're considering this, you should know that a pcm tune will be required to get what you're expecting out of it.
Upgrading the valvetrain without tuning for it WILL disappoint you.
If you also upgrade the cam without a tune, it will basically convince you that a tune is necessary.
And now for the counterpoint ... (If your '06 YXL already has 4.10, skip the rest of this post. Otherwise ...)
GM under-geared every axle in every vehicle with a V8 they've sold since 1975 (CAFE MpG standards).
I bet it has a 3.73 axle?
You may not fully appreciate how much more sprightly it'll be with a 4.10 axle (and you only need ONE axle, you lucky bastaducci).
'But what about MpGs?'
Your city MpG will either stay the same or IMPROVE.
True, your highway MpG will be far more dependent on the discipline of your right foot.
For every MpG you 'waste', though, you'll get back more smiles per gallon, I assure you.
(If it has a 3.42 axle, then don't waste any more time thinking about upgrading the engine!)
(And if it has tires taller than 32", 4.30.)
Upgrading the engine is simply not going to give you the bang-for-the-buck that upgrading your axle gear will.
If only you had someone close enough to you with 4.10 or 4.30 ...