distributor flange fit/350 sbc

i am building a sbc 350. i purchaced the new edelbrock performer eps intake manifold and installed it. my problem started when i went to install my accel distributor. i noticed a considerable amount of slop between the manifold bore and the distributor flange. upon further inspection i discovered that the manifold bore checked at 1.437 dia. and the distributor flange checked at 1.247 dia. whats going on here? is this a normal thing? i have talked to serveral guys about this and nobody seems to be aware of this. i have seen bushings offered by mr.gasket. is this something i should be using? i went to the store where i purchased the manifold and explained to the owner what was going on. he told me has been selling edelbrock manifolds for quite a few years and never seen it or heard of it. we checked all of the manifolds on display and found the samething with them. does anybody have any ideas.
thanks michiganbutch

Edelbrock has a tech line service. Get their number from the paperwork that came with your manifold or from one of their ads or web site. See if they've run into this before and if they have a solution.

I've got the exact same issue with a GM high perf intake and a MSD dist. The measurements are nearly exact. I have found the MR. Gasket bushing you spoke about but have yet to try it. With that much slop you've got to wonder about shaft alignment and what's going to happen to the gears. Have you got it worked out yet?

Thanks for the reply Streets. My paperwork does not mention the hole dia. I went on to chevys website and the part no. is no longer listed. Chevy has darn good info on their crate motors but alas, mine is now not listed (the newer version has a tad more torque. and is the replacement). I called MSD and they said that they machine the dist to chevy specs... Yeah, thanks.

What do you think about running a bronze dist gear with this motor? I know it has a roller which is probably steel.

BTW - Your replies have been great. This is my first day on the site and the info is terrific. I shoulda been here a long time ago.

I own 2 72 stepsides. One is halfway finished. I'm smothing the whole thing. Marker lights are gone, trim, etc, etc. There's only gonna be a doorhandle on the side. Tank within the framerails, stainless lines, etc, etc. I just picked up a 6 cyl bone stocker to use as my break in pad. Drove down to Ala and drove it back. 99% rust free. As you can see I've been Camaroed and Chevelled to death. Trucks are now my vehicles of choice. I've also sold my last SBC - Now its time for cubes.

Thanks for the insight