from a holley to a quadrajet

[Buddy]

I just took of my holley carb because it was working like garbage, Now I am trying to install my quadajet. The problem is the part where the throttle cable is seems different. I cant seem to understand how the bracket secures to the carb. I understaand the cable part just not the part where the bracket holds the cable back off the carb. It is a brass color and both cables pass through it. Also i have no clue where the vacum lines go, it seems to have a different set up.can some one explain this part. I only have 3 lines on my holley one to the booster and one to the vacum and on to my PCV. but  dont which one they are on the quadrajet one. Also there are no bolts that came witht this carb any idea on the length and size of the two rear bolts? I am starting to think this might have been a bad idea, but i really want to go with this carb as I just paid to have it rebuilt.

[Buddy]

anybody..... i am reallylost on this one!!

[1980c10]

any pics?

[eventhorizon66]

Factory Q-jets never used a throttle bracket that bolted at the rear left corner of the carb base like what you're most likely describing (pic?).  The factory throttle brackets bolted to the rear left two intake manifold bolts.  Here is an adjustable aftermarket version of the factory bracket: http://www.summitracing.com/parts/EDL-8031/

The Q-jet PCV vacuum line goes to the 3/8" barb on the front of the carb base (under the fuel filter housing).  The brake vacuum line would normally go to the back.  There is a NPT threaded hole back there (center of baseplate) that you can screw a factory fitting into or just a NPT to 3/8" barb fitting you can find at any hardware store.

[Buddy]

Ok thanks alot, one last question? what do i do with the lines i dont have something to go to them? just leave them open or block them off somehow

[eventhorizon66]

Never leave vacuum ports open.  Cap them off with some appropriate rubber vacuum caps.

You can find these at any auto parts store:
http://shop.advanceautoparts.com/webapp/wcs/stores/servlet/product_x_9110159-P_x_x?cm_mmc=CSE-_-Google-_-VALUE3-_-VALUE4&ci_src=14110944&ci_sku=9110159

[4x4orbust]

i would not suggest using those dorman vacuum caps.    I had a huge problem with them deteriorating and allowing vacuum leaks.   there is another vinyl type caps that hold up much better.

[eventhorizon66]

I've used them for years and have yet to see one deteriorate.  I'm not necessarily advocating Dorman above others, but the point is to use some sort of cap on the ports.