Has anyone order or has that new lsx 376 engine package in their car or truck running I'm looking to upgrade my 4.8 but don't really know much about it and they advertise it around the 450 Hp range is that a good engine or what do ya think

 

Buy a 6.0 block, get it machined ti a 370, 402, or 408. Then buy forged internals and such and assemble

 

How much power will be expected on a 408 with ported and polished ls6 heads. I don't wAnt to use l92 heads cause I'll have to change out the manifold

 

The LSX376 also uses L92 heads, Its basicly a LS3 built for boost. The potential of a 408 is dependent on alot more than just the intake port design. Guys have been making big power on catherdral port heads long before the L92s came out and with well matched parts I'm sure you could do the same.

 

About how much power are you talking about an estimate to the rear wheels

 

I would think 350-450 depending on how radical you go. Again this is just a random number without knowing more specs though.

 

Or should I just keep the 4.8 and get a turbo from Kyle from kb racing

 

The lsx376 is built for boost, there are much better NA options.