1988 GMC C1500 - Z06 Package!

[OutlawDrifter]

First off...no...Z06's don't have autotragics...so let me just put a stop to this nonsense now!

 

[PolarBear]

The LS6 heads were sent to the machine shop, hot tanked and checked.

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Received them, finished hand cleaning, cleaned the valves, new valve seals, PAC 1219 .625" lift springs installed, painted with VHT fresh cast aluminum paint, threads chased.

Still waiting on the shortblock, was supposed to be end of April, early May, now it's early June.

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[Supercharged111]

What? No porting?

 

[PolarBear]

What? No porting?

I've had really good success with as-cast 243/799 heads and compression.

Alot of what I've seen, beyond a simple blend, porting changes the port velocity in a bad way and you may gain 10-15hp, at that point it isn't worth the cash in my opinion.

 

[PolarBear]

Went ahead and did the Comp rocker arm trunnion upgrade today.

Once you've had a stock rocker fail, by dumping it's needle bearings out, locking the rocker down and ventilating a piston via force, the trunnion kit is an always-do upgrade.

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[Supercharged111]

Went ahead and did the Comp rocker arm trunnion upgrade today.

Once you've had a stock rocker fail, by dumping it's needle bearings out, locking the rocker down and ventilating a piston via force, the trunnion kit is an always-do upgrade.

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You ever had a late rocker spit out the needles?

 

[PolarBear]

You ever had a late rocker spit out the needles?

In respect to the rectangle port, offset intake rockers, or just late model cathedral port?

I've seen and experienced 07+ cathedral port bearing failures. Never on a 07+ rectangle port head.

 

[Supercharged111]

In respect to the rectangle port, offset intake rockers, or just late model cathedral port?

I've seen and experienced 07+ cathedral port bearing failures. Never on a 07+ rectangle port head.

How many iterations were there? I was thinking cathedral port circa de 2004. That was V2 from what I understand.

 

[PolarBear]

How many iterations were there? I was thinking cathedral port circa de 2004. That was V2 from what I understand.

From my research, something changed in 2005. But I also frequently use 07-13 243/799 truck heads and always change the bearings out. I will say, the non-captured needle bearings are the same as 97-04 rocker assemblies.

 

[Supercharged111]

From my research, something changed in 2005. But I also frequently use 07-13 243/799 truck heads and always change the bearings out. I will say, the non-captured needle bearings are the same as 97-04 rocker assemblies.

Is that the easy visual cue then? Captured vs non? Because I could swear the change happened closer to 2002.