Will L92 heads work on a 5.3?

 

L92 heads, due to their rather large intake valve, require at least a 4.00" bore to be utilized. Roughly speaking, they'll fit on a stock bore 6.0l, and larger, bores.

 

no, you need atleast a 4.00" bore.

 

Like these guys have posted you will need at least a 4.00" bore to run the L92 heads.

 

GMPP just released a set of 3.905" bore L92 heads. might check into them and see just how small of a bore they can fit on...

 

Thanks for te info guys! Now my next ? is out of the "new" small bore L92s or the 317s, what would yall recomend for a 5.3 master power t70 on pump gas?

 

In almost every sense of the word, those aren't L92 heads!

 

I just picked up a GMPP catalog today while on my lunch break, I didn't see any "small bore" rectangle port heads in there.

 

they are in there. not saying i have used them... just something to look into.

seemed like a l92 head with 2.00 valves.

 

See thats the thing, its not going to be a N/A motor. It will be consuming air from a master power t70 at the tune of about 13# on pump gas.
Im just wondering if these heads are more trouble than they are worth, and if it should just stay with the original plan of using the 317s and a ls6 intake/tb and be done with it?

 

the GMPP catalog says the small bore l92 heads can be used on a minimum bore of 3.890". I haven't seen the head nor do I know the guide spacing but it doesn't sound like it would work on the 3.780" bore the 5.3 has.

 

was there any update on this? did anyone ever find out if the small bore heads would work? im very interested in trying to get the rectangle port onto my 4.8 so I can put a LSA supercharger on it.


-THanks
Dane