GREENSIERRA

My bad, I meant a rec truck intake.
The seller I bought it from off ebay said it was cathedral port and pics were cathedral. Bought it and got it and it was rec port so ended up keeping it and getting a rec port TBSS that's on now.
sorry to jack the thread.
hope more people chime in on this as I would like to know if its worth the money to swap over.

ZO6Ted

Ported L92's, hell yes. Stock, not really enough for the hassle IMO.

dirt track racer 81

iTrader: (45)

I made 455 with milled l92 on a 370. That's 14 more than what a guy had posted recently with a ported prc cathedral heads.. Made 670 on 7 cylinders on the bottle.. Id say they are worth messing with..

oakley6575

iTrader: (5)

Listen to Tyler. He has real hands on experience with these heads and obviously a lot of these guys don't. The cam you are running right now will work well with a rectangle port head. They typically don't like large cams without a healthy dose of nitrous. I ran stock LS3 heads on my 408 and it was a handful. But like stated earlier, you can buy stock rect heads for much cheaper than a port job for a cathedral port head. And then you have room for more power down the road.

GREENSIERRA

How are Dallas Performance heads?
Debating on a set right now.

WhiteChevy3

@jake and @tyler, thanks for confirming my thoughts on the l92 swap. One reason for this instead of ported cathedrals is the price as tyler mentioned. Now I just need to locate some mill em and slap them on.
My current setup is such a dog it pisses me off, I expected more. I believe this will do the trick.

dirt track racer 81

iTrader: (45)

Sounds good.. For the money it's hard to make the power with a cathedral head like the rectangle port head will do... And if you wanted to spend the money money on ported heads, get the rectangle ports heads ported.. I believe skeet made close to 500 rwhp..

Mikey 97Z M6

iTrader: (35)

The forged 370 I have in the Camaro put down 490rwhp (n/a) on a Mustang dyno with self-ported L92 heads. It should pick up about 20-30hp with the Vic Jr and Accufab throttle body.

The L92 heads work very well with the right combination but I do believe they are a bit more picky with cam selection. The huge intake ports tend to slow down port velocity at lower rpms.

Mike

slowswb

iTrader: (5)

My lq9 with ls3 heads milled .30 and the cam is 232/244 622/622 113+4 put down 447 on motor and on nitrous on 250 shot it put 688.

01WS6/tamu

iTrader: (36)

stock 2007 up 3/4 trucks with a 6.0 are dogs for a reason and it's the same combo you are pondering doing on yours.
Low compression motors and a set of heads that flow badass in the top end but have super lazy airflow in a non WOT daily driver combo= gutless