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Or you can install new intake manifold gaskets that block off the exhaust passage right at the intake interface.
I was responding to this:from Ar. Hillbilly:
"I plan to keep the pcv running to the air cleaner."
I got the impression he was running the PCV hose to the air cleaner, which would not work.
For that tube sticking out the side of the filler neck, you can still run a hose from it to the air cleaner, or just install a little filter on it like I did.
Or you can install new intake manifold gaskets that block off the exhaust passage right at the intake interface.
d.
What type of gasket? Something I would make from exhaust material? I really do want to block that off below the carb spacer.
I do need to add another spacer to make the throttle linkage clear.
in the past I have run valve covers with a pair of Filter oil filler caps and run the PCV from a Grommet to the intake manifold ... and you can use Copper sheet to make any custom gasket you want to do Various block offs
There are some gaskets from Fel-Pro that come with a block-off piece that fit into that middle hole to block off the exhaust flow from the head into the intake. Mine did, though I don't show it in this picture:
I would be hesitant to block off the exhaust crossover at the head mating surface, all the carbed intakes had this crossover to provide carburetor heating. The only difference is that the earlier ones did not have the oval port connecting to the carb spacer mounting surface.
Somebody makes a carb spacer plate (thin steel stock) to block that carb pad EGR opening. It is common for the 7.5L. I will keep looking.
As for the oil filler pipe, your fresh air inlet points outwards and the ones I remember point inwards (see earlier ILL with U-BEND hose). To keep the appearance clean (yes, I am OCD) looking, maybe someone here can look at their period carb engines and see what year(s) had the tube pointing inwards. You would then source that year rocker cover. The appearance should be the same as the present RS.
For the grommet on the RS cover, there are specialty elbows to arrive at the correct angle to connect with the nipple on the carb spacer.
I like the look of an engine appearing (or close relative) as it's coming from the factory. Less attention drawn at emissions testing, etc.
If the engine has a heat riser valve, it will depend on the crossover for carb heat. If no riser valve, just EGR. It all depends on year and emission compliance design.
"Do you see a problem with blocking the hole at the intake gasket?"
No, if that hole is blocked then the intake would merely function like the earlier intakes, allowing the exhaust to pulse back and forth under the carburetor pad.
Edit: Disregard post, I was thinking of blocking the hole at the carburetor pad.
Last edited by Beanscoot; Feb 24, 2020 at 10:09 PM.
Reason: Correction
If I blocked the exhaust passages into both sides of the intake manifold, I'm not sure how exhaust would get into the carburetor pad; isn't that the whole point of blocking those holes?
I can see if you're using the exhaust heat passage for the automatic choke, that would be defeated.
There are two ways out (well, three actually if you buy an aftermarket intake), either using block-off intake gaskets or using the EDEL block-off carb mounting plate -
Fel-Pro Performance Intake Manifold Gasket Set
Carburetor Spacer - EDEL #8714 Divided Center 1in Thick
