The Ford Barn

jeepguy1948 · 12-12-2022, 12:57 PM

It is my understanding that there are some down draft intake manifolds floating around that are for a 2 bolt Rochester flange. I would appreciate it if someone could tell me what the center to center measurement of the mounting bolts/studs and the bore size. I would also like to know where I could find one new or used. Thanks!

Flathead · 12-14-2022, 05:29 PM

I have such a manifold, I just measured it and the bore is 1 9/16" and the bolt hole centers are 2 11/16". It has a one barrel ford carb on from a straight six flathead Ford. I do not want to sell it but wanted to share those dimensions with you.

This is an old aluminum manifold, not recent.

a30roadster · 12-14-2022, 05:31 PM

I have a new single carb 2 bolt manifold. Throat diameter is 1.54 and center/center bolt holes are 2.66. I am not a machinist, so measurements are close, but not exact. If you have interest, give me a call. Roger Miller, 515-965-5727.

jeepguy1948 · 12-16-2022, 01:24 PM

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Thank you Flathead for taking the time to get me those measurements, those were very helpful.

12-12-2022, 12:57 PM	#1
jeepguy1948 Senior Member Join Date: Jan 2022 Posts: 756	2 bolt down draft? It is my understanding that there are some down draft intake manifolds floating around that are for a 2 bolt Rochester flange. I would appreciate it if someone could tell me what the center to center measurement of the mounting bolts/studs and the bore size. I would also like to know where I could find one new or used. Thanks!

12-14-2022, 05:29 PM	#2
Flathead Senior Member Join Date: May 2010 Location: Southern Maine Posts: 1,512	Re: 2 bolt down draft? I have such a manifold, I just measured it and the bore is 1 9/16" and the bolt hole centers are 2 11/16". It has a one barrel ford carb on from a straight six flathead Ford. I do not want to sell it but wanted to share those dimensions with you. This is an old aluminum manifold, not recent.

12-14-2022, 05:31 PM	#3
a30roadster Junior Member Join Date: Oct 2016 Posts: 14	Re: 2 bolt down draft? I have a new single carb 2 bolt manifold. Throat diameter is 1.54 and center/center bolt holes are 2.66. I am not a machinist, so measurements are close, but not exact. If you have interest, give me a call. Roger Miller, 515-965-5727.

12-16-2022, 01:24 PM	#4
jeepguy1948 Senior Member Join Date: Jan 2022 Posts: 756	Re: 2 bolt down draft? Sponsored Links (Register now to hide all advertisements) Thank you Flathead for taking the time to get me those measurements, those were very helpful.