Does anyone have a good understanding on this cus im a little un educated on it...will these 706 heads work well with the motor i have( 5.3L bored out to have stock flat top ls1 pistons and stock 5.3 crank and a stock ls1 intake manifold) Thanks Guys

 

I run 706's on my bored 5.3. They work pretty good from what I can tell.

 

im running them on my 6.0 and soon to be 402. richard at west coast did a port job on them and they flow right at 300cfm. not bad in my opinion