70ls1chevelle

iTrader: (114)

I have a 99 Silverado factory 5.3 truck,i currently have a LQ9 6.0 in it now.What all parts in detail do i need to do an L92 head swap.Like what fuel rail and other stuff ?Any help Thanks

D_reks{5.3}

iTrader: (13)

A complete L92 or Ls3 Intake manifold, 90mm Throttle body and some L92 or Ls3 heads.. Oh and a Dr. X harness since you will be going from a 78mm to a 90mm TB with a Ls3 intake mani..

skeet

iTrader: (18)

heads, intake/TB, water pump, water pump spacers, moddified alt bracket, spacer for the idler pulley, idler pulley moved to center bolt hole of the alt bracket. cable driven thorttle cable will need a custom ( homemade bracket ) for the linkage. as for the intake the truck intake and fuel rails will work just need to do some modifications, i opted to use the edelbrock fuel rails, your injectors may work with the stock truck l92 intake.

D_reks{5.3}

iTrader: (13)

If he uses the Truck style intake, does he still need the water pump? I thought it was the same unless you go car style intake..

70ls1chevelle

iTrader: (114)

I plan on using the L92 truck intake.Do i need the L92 fuelrail and injectors ?

skeet

iTrader: (18)

my bad, no he doesnt good catch !

it'll have to be moddified for return style fuel system

70ls1chevelle

iTrader: (114)

Is the swap really worth doing ? I have a cam that i believe would work well with those also.

denali_on_26's

iTrader: (26)

YES!
i have some stock 3K mile l92 injectors they would work well with a cam

jerrynaranjo08

what about a tune? does he need a tune for the l92 head swap?

D_reks{5.3}

iTrader: (13)

Does he have to get a tune? no, But should he? yes if he wants to get the full potential out of the heads.

As far as it being worth it, I believe so. I bet you will pick up a solid 20-30rwhp by just switching heads, If you do heads and cam your looking at a good 40+ rwhp gain easy..