2 bolt down draft?

J

jeepguy1948

Well-known member
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!
 
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.
 
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.
 
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