DUI Adjustable Vacuum Can Allen Key Size?

['68falconohio]

Do the DUIs have an adjustable vacuum can?
If so, does anyone knwo the size of the allen key that's hiding in there?

I want my vac. advance to come in at a different rate/little later. Vacuum can is connected to ported vacuum.

Thanks,
Stephen

 

[fphillips]

My DUI didn't have an adjustable can. I put an Accel replacement on it.

 

[FalconSedanDelivery]

If it has flats around the small diameter of the vac adv , its 7/64,

 

['68falconohio]

Thanks,
There are no flats around the small diameter. I tried 7/64" and sized down from there since it was the largest that would fit in the vacuum port. I couldn't feel any sort of screw in the can but wanted to check on here to make sure I wasn't missing it.
Looks like I'm buying an adjustable vac advance can.

fphillips,
I'm assuming a replacement for a GM HEI distributor will work?

 

[FalconSedanDelivery]

Yes , the crane cams unit was the best deal if you can still get it as it cam with a limiter , and some springs too part number proform seems to have the best deal , its on summits site for 16.95