Hi, I've got an Edmunds dual intake with dual 94's. It is water heated but I have no clue how to plumb it. There are 3 openings. Can someone describe how to plumb it or maybe be able to post a picture. Thanks
Dennis

The bungs next to the carburators are for the water heat, just run it like a heater core or in line with the heater core. The other fitting is for vacuum accessories. Check for water jacket leaks in the intake before you fire it up so you don't hydrolock the cylinders.

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1950 Chevy pickup with '62 261, 4 speed.

hmm. All 3 are 3/8 pipe. Would the vacuum be 3/8?

There should be a fitting into the manifold to supply vaccuum for the wipers.

If none of the fittings in question appear to go into the intake portion, just blow some compressed air or water from your garden hose into one of the fittings and see if it comes out of just one or both of the fittings. I doubt it matters which ones you use (if all 3 can be used).

Since your the one with the intake, posting a picture might help.

The one that I had had all 3/8 npt fittings. You will need to get hose barbs for them. The vacuum holes on mine were out at the ends on the runners and the water heat was right under the carbs. You should be able to see daylight on the vacuum one.

I x-rayed one of those manifolds a few years back and the water pipe looked like swiss cheese, was almost gone inside. Make very sure it's not leaking into the manifold!!!!!!

Thanks for your replies. Except for the swiss cheese HiTork. Just kidding HiTork. I didn't even consider the inside being corroded away. I'll certainly check it out. I plan on not using water heating until it looks like I need it.
Dennis