5.3 cutty

iTrader: (2)

i have a 99 iron block 5.3 and i came into a set of ls2 heads and cam .i know they cam off a newer gto but i want to know will these 6 liter parts will fit my 5.3.....any info will be helpful thanks.....

the_merv

iTrader: (88)

Yes. I would find a better Cam..the LS2 Cam will NOT work without the LS2 Timing Cover , Sensor, & Gear.

5.3 cutty

iTrader: (2)

ls2 cam for sale obo lol!!!!

5.3 cutty

iTrader: (2)

these are the heads....

TurboLark

iTrader: (3)

Using the ls2 heads will lower your compression ratio a bit i believe. the 5.3's only had a 61cc chamber.

5.3 cutty

iTrader: (2)

So is it even worth the hassle to use the ls2 heads with a mild cam

v8envy

iTrader: (1)

not really, if you really want better heads on your 5.3, go find some 243 or 799 casting heads they are identical to ls6 heads the ones on the trucks have different valves but still perform great. Sell the ls2 heads and cam, you can't use that anyway. find a used Ls6 cam and springs and you will have a good running low budget 5.3 that can make 380 hp

bigmandengo

iTrader: (21)

As far as I know ls2 heads are 799s

Jimbo1367

LS2 heads(GTO) are 243s

1989k1500

iTrader: (23)

Like said you cant use the cam with out a bunch of other parts, which makes it completely not worth it.

I would sell the heads too.

I think a 4.8/5.3 head has a 59cc chamber.

1989k1500

iTrader: (23)

You dont have a regular 5.3 like his 99 5.3. Yours is a L33 and has flat top pistons and 799 heads stock.

His 5.3 has dished pistons.

v8envy

iTrader: (1)

ahhh yes good point, I was pretty sure the 6.0 Ls2 had bigger chambers I should have done my homework.... ok well if he has dished pistons keep the 243/799 heads and put a turbo on it to compensate for the loss in compression...lol

TurboLark

iTrader: (3)

There is the solution right there!!