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31 Posts
Discussion Starter #1
I am running a 400 with a/c in my '79.

Does anyone know if the pro comp HEI with fit with the A/C bracket in?

Does anyone know the OD (outside diameter) oh the HEI cap? I know they are bigger than stock and that some applications have problems with the air cleaner fitting but can't find any info on A/C.
 

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Premium Member
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31 Posts
Discussion Starter #3
your running an msd with an external coil. i was talkin HEI with the coil in the top of the cap.

thanks though
 

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Discussion Starter #4
It fits

For those who care. A GM style HEI distributer will fit a 400 with A/C. Only problem I had was a plug in my edelbrock performer intake.
It had a hex head plug, the cap hit it when trying to adjust timing.

I had to install a hollow hex plug. Original plug on the left.
plugs.JPG

pluginintake.JPG

Everything else clears fine. I am running a Holley truck avenger carb. Close, but fits. OD (outside diameter) of the cap is close to 5.5 inches.

front.JPG

top.JPG
 
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