[blueghoast]

I decided to leave the compression alone for better performance and gas mileage.
I'll try it without the vac-advance to.
What about the holes that go down into the exhaust valve stems, Should I plug those
with 1/8 pipe plugs. That's got to let a lot of dirt and grime into the valve stem area.
Sure do appreciate all the info on this. Thanks a bunch guy's.

GT.

[Bill Hanlon]

Originally Posted by blueghoast

What about the holes that go down into the exhaust valve stems, Should I plug those with 1/8 pipe plugs. That's got to let a lot of dirt and grime into the valve stem area.GT.

I thought the holes (if we are talking about the same ones) are to the intake valve stem area. I daily drove my '57 GMC (Pontiac) V8 for over 100K miles with no bad effects with the holes open. Here is a drawing from '57 GMC Maintenance Manual showing the hole (#10 valve guide vent) I am speaking of. Holes are MUCH smaller than 1/8 NPT. Probably closer to a #6 screw.
http://chevy.oldcarmanualproject.com...5559mm412.html

[Engine-Ear]

Originally Posted by blueghoast

What about the holes that go down into the exhaust valve stems, Should I plug those with 1/8 pipe plugs. That's got to let a lot of dirt and grime into the valve stem area. Sure do appreciate all the info on this. Thanks a bunch guy's.

Ooof. I have no clue what you're talking about.

[blueghoast]

Maybe it is the intake side. I never had a problem with my 55 either
So I'll leave it alone to.
Engine ear, They look like where the smog holes were for the California cars.
They go all the way through to the valve stem. Check out the drawing below.

GT.

[blueghoast]

It's coming together.
Here is some mock-up eye candy.
I've got to get the correct color also
Factory scripted valve covers if it shows up.

GT.