# Need some minor CNC work

**URL:** <https://forums.speedlife.net/t/need-some-minor-cnc-work/184560>\
**Category:** PittSpeed Automotive\
**Created:** [August 28, 2006, 9:26am UTC](https://forums.speedlife.net/t/need-some-minor-cnc-work/184560 "2006-08-28T09:26:22Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![beat90tsi](https://avatars.discourse-cdn.com/v4/letter/b/43a26b/32.png) [@beat90tsi](https://forums.speedlife.net/u/beat90tsi)\
**Post date:** [August 28, 2006, 9:26am UTC](https://forums.speedlife.net/t/need-some-minor-cnc-work/184560/1 "2006-08-28T09:26:22Z")

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I have a 78 CJ7 with a 360, and I’m running a GM TBI system on it. I just switched from a 4bbl manifold to a 2bbl to get more appropriate flow to the engine. I drilled new holes in the adapter plate, but now my studs hit the TBI when I try to put it on. I need someone to machine out the holes so I can use bolts, and the heads will sit below the surface, and my TBI can sit flush. I was going to attack it with a carbide bit, but figured that would be really messy, and considered a drill press, but I don’t really want a tapered seat.

Where is the best place to go locally for this kind of a small job?

Thanks,  
Jon

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**Author:** ![SixSpeed454SS](https://avatars.discourse-cdn.com/v4/letter/s/e19adc/32.png) [@SixSpeed454SS](https://forums.speedlife.net/u/SixSpeed454SS)\
**Post date:** [September 19, 2006, 5:50pm UTC](https://forums.speedlife.net/t/need-some-minor-cnc-work/184560/2 "2006-09-19T17:50:22Z")

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> [@SIQQQ FBODY MOVIE](https://forums.speedlife.net/t/siqqq-fbody-movie/23710/36):
>
> I have a 78 CJ7 with a 360, and I’m running a GM TBI system on it. I just switched from a 4bbl manifold to a 2bbl to get more appropriate flow to the engine. I drilled new holes in the adapter plate, but now my studs hit the TBI when I try to put it on. I need someone to machine out the holes so I can use bolts, and the heads will sit below the surface, and my TBI can sit flush. I was going to attack it with a carbide bit, but figured that would be really messy, and considered a drill press, but I don’t really want a tapered seat.
> 
> Where is the best place to go locally for this kind of a small job?
> 
> Thanks,  
> Jon

What kind of adapter plate you running? I know Holley makes one that is about 3/8" thick. I used it when I ran my TBI on a dual plane manifold several years back. It will adapt GM TBI to 4bbl manifold, but I would think it’d be easier to work with instead of GM TBI adapter (if that is what you are using).

Just my .02