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The reason I am replacing those gaskets is the truck is 40 years old
One important thing to learn about old vehicles: setting out to replace parts just because, without any indication they're due for replacement, is a good way to cost y'self a lot of money, time, blood, sweat, and tears. In other words: if it's working, and it's not a scheduled-replacement part, best leave it be.
(This also applies to old houses, but at a much bigger scale of money, time, blood, sweat, and tears.)
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I'm not sure the exhaust intake gasket is shot
You'd know. Quote:
the donut gasket is gone
There's no donut gasket on a Slant-6. A donut gasket goes into a ball-and-socket type exhaust manifold outlet, and allows the engine to pivot relative to the headpipe. No such setup was ever built into a Slant-6, it's not found on any aftermarket manifold (maybe on some headers?), and it's not something that might be added later by an exhaust shop or anything like that. This is a donut gasket:Attachment:
Doughnut-Gasket.jpg [ 173.05 KiB | Viewed 659 times ]
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Pipeflange_Gasket.jpg [ 20.88 KiB | Viewed 659 times ]
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I thought with that old of a motor if I'm going to pull the manifold in the intake I might as well replace head gasket while I have manifold exhaust off
This logic is not sound.Quote:
I'm going to replace timing chain and gears lean burn conversion.
All good ideas. Quote:
I am replacing 0ne barrel carter I am using trans adapter for 2 barrel
Those adapters make a bunch of problems and spoil the advantage of the 2bbl carburetor. Do the job correctly; use a 2bbl intake or make your own; parallel 2bbl setup article. Photo documentation of a very well done such conversion is here, and there's a nice pictorial on modifying a 1bbl intake here.
