Author Topic: 78 Formula 403 top end rebuild...PIC HEAVY  (Read 734 times)

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Offline Hooper

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78 Formula 403 top end rebuild...PIC HEAVY
« on: March 11, 2011, 12:01:27 AM »
Well a simple exhaust leak turned into the following…Actually I would have been happy with a simple exhaust gasket change, but upon inspection the exhaust bolts would only stay hand tight…so to do it right the heads were removed and tapped. Then we decided to change all the valves based on the previous damage.

The heads were baked out and the intake and exhaust manifolds were cleaned in a solution and then painted with some high heat paint. Next the #8 cylinder was pulled because of low compression so it was pulled honed and new rings were put on.
The heads were found to be not “shaved” the same so they are now matched with a little extra taken off of some HP. Shhhh that’s on the down low…lol…Good thing we have a shop or I couldn’t afford this :)  

It was a GREAT team effort!!!!

Here is what “Gwen” our shop 78 403 Formula just went through…

And so it begins...

Hmmm...valve issues

Off with your head!

Time to head to baking

Baked out and new springs and seats

Detail shot

Exhaust manifold touch up

Intake manifold touch up

Back together

Valve covers repainted

Painted valve covers on


Wheel swap time

Totally vintage!

To keep up with more on “Gwen” bookmark

« Last Edit: March 12, 2011, 11:57:15 AM by Hooper »
1971 Firebird - “Destiny”
1976 Trans-Am - SOLD
1977 Trans-Am - “Christine” - Hurricane Ike RETIRED
1977 Trans-Am - “Christine 2”
1977 Trans-Am - “Eleanor” (My son’s car)
1978 Formula - “Gwen”
1978 Trans-Am Clone - “Fireball

Offline Frode_skj

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Re: An exhaust leak caused this...PIC HEAVY
« Reply #1 on: March 11, 2011, 02:34:19 AM »
Looks nice :)
"79 Trans Am tenth Anniversary Edition"
"81 Turbo Trans Am"
Sad to see that people part out T\A's :( especially saveable ones