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But it has something to do with heat treat. Copper isolates the steel from the carbon during the heat treat. I understand the small and large ends are heat treated, then machined, (obviously) whereas the beam is not.

It's for the heat treating process before carburizing. https://www.cp-carrillo.com/n-12112-carburized-rods.html

Here's a video advertising a machine. It looks slick but E X pensive! Boy, it does a lot of neat stuff though.

CNC ported isn't necessary for a performance build. Ported heads are. CNC is good for consistency in production.

Sealed Power has always been top notch. (unless things have changed)

What's the difference in the torque?

Hard to believe a 5/16 bolt has that much strength. Multiply that by 4 and you have enough to lift a 800# engine.

They probably came out of a old tractor pull rig. Don't offer too much. See where the guy is. He may thing a few hundred a piece is a fair price.

Run it.

Indian Head gasket removal :lol:

I like to teach or at least put the false information back on the shelf.

Here's am explanation from Slantsixdan explaining the system, how it works and the history. " PCV became mandatory in California for '61, in New York for '62, and was standard equipment in all states + Canada for '63. The purpose of the crankcase ventilation system (of whatever type) is to...

Ya, in post #10 :lol:

Vac-u-pan

Yes

Polution control. The downdraft tube was first, pcv second, pcv with breather from air cleaner next

The early systems were open. A breather/oil fill cap on one valve cover and a pcv on the other.

They might be interested. Let's ask Dan. @Dan Brewer

The original intakes had the pan and no port side gaskets. I used to spray them with Permatex sealer. The red/maroon colored stuff. I don't remember sealing the ends either and never had leaks. You sure could use the gaskets on each side of the metal with a smear of black silicone on both ends...