Looking to start a build for my 2007 Chevy avalanche. My question is what is the most cost affective way of building a 408 that would be able to handle 800rwhp +. Should I get a short block from tsp or start in a different direction. Also will my stock 5.3 heads work on a 6.0?

Thanks in advance.

 

Find an lq4 block, and get a 408 rotating assembly from tsp for 1600. Yeah your heads will work for a 6.0, It'll have killer compression and you won't be able to run real high lift cams. Theyll choke the 408 in stock form I'm sure, if they can even work for a 408

 

No real "cheap" way. The machine work is still high $. Good luck buddy.

 

Get a junk yard 6.0 with less than 100k, buy a kb racing turbo kit and be done with it. Screw building a 408.

 

I wouldnt use cheap and 408 in the same sentence...if you go in with that attitude you will end up spending more because of replacing shortcuts.

 

I'm going with a trick performance kit

 

There isn't one.
Turbo the 5.3

You could do a 370 which is the same bore as a 408 but not stroked. 5.3 heads aren't made for a 4" bore so you'll need 6.0 heads.

 

Can I stroke my 5.3 to a 370 or is that using a 6.0L block? Also I'm looking at a Ly6 6.0 and I'm wondering which 6.0 can handle more power the older or newer 6.0s?

 

Turbo 5.3 or turbo 6.0 > 408

 

He speaks the truth