Intake manifold filler tube size?

[frank mccracken]

I have to bore my Edelbrock manifold for a breather tube, small block. Can anyone tell me the exact hole size? I know that some have freeze plugs in them to block them off. The freeze plugs usually have the size stamped on them. If someone could look at theirs and let me know what it says.
Thanks, Frank.

[Clem Z.]

mic the tube OD and then allow for a shrink fit *NM*

[frank mccracken]

Re: mic the tube OD and then allow for a shrink fi

Thanks Clem. It is a new tube so I kinda want to make the hole the factory size.

[Clem Z.]

i would still mic it because if it is a repo it

could be any size.

[frank mccracken]

Re: i would still mic it because if it is a repo i

Good advise Clem, I'm sure it's an offshore. I don't know how much interferance, I suppose my machine shop guy should know. It wouldn't hurt I suppose to have some advise in this area also, just in case he is wrong, then I can run away...

[mike mccagh]

Re: i would still mic it because if it is a repo i

mic the end of the fill tube, not 1/2 way up the tapered end. use that measurement to bore the intake. i assume the repo tube is configured similar to the originals. good luck, mike

[frank mccracken]

Re: i would still mic it because if it is a repo i

Thanks guys, I did not realize that they were tapered. That makes the deal a whole lot easier.

[Joe L.]

Re: Intake manifold filler tube size?

Frank------

The hole measures 1.24" OD. While the tube is tapered, the hole is not.

[frank mccracken]

Re: Intake manifold filler tube size?

Thanks Joe; I thats what I need.