whats the diffrence on the 5.3L cast numbers 862, 895, 706 numbers so far as combustion chamber and intake and exhaust flow and valve sizes

 

to my knowledge, nothing just used a different or newer cast maybe?

 

Posted this a while back on another thread.... LINK

Hope it helps.


btw, I've never heard of cast# 895 heads. I've seen cast# 799 5.3 heads though, which come on the all aluminum L33s. They are supposed to be somewhat similar to the LS6 heads (243), but with a 3.78 bore.