Ive read on here that the reason the new 4.8 5.3 trucks run so good is because theyre running the z06 heads (not sure of the casting #) from the dealer. Would these heads fit a 2000 4.8? Would it be worth it or should i look into some from patriot or someone else. This is just an idea. Thanks Guys.

 

get them milled to 58cc's while your at it and it would be a worthiwhile swap

 

Any certain casting number? Of course I guess id have to go ahead and get the intake and throttle body too and if im not mistaken its a 90mm TB.

 

799/243

 

Thanks, actually this might be going on a 01 5.3 that im getting. Are the L92 heads too much for the 4.8 and 5.3?

 

They require a 4" bore.

 

yeah i remember seeing that on here. Has anyone swapped the newer heads and intake on their trucks yet?

 

The 5.3 that getting has 862 heads on it and i was wondering if these are good heads or not.

 

706s and 862s are the same besides one has a smoother casting.