jessejames

Just wondering if there is a certain carb I need to put on my 330. Will most rochester quadrajets work?

aliensatemybuick

Assuming its a 4 bbl and It its a '65, it will have a "square bore" carb and intake manifold opening to accomodate (i.e. the 2 front primary and 2 rear secondary holes are of generally equal diameter. A Rochester "4-Jet" or otherwise called a "4GC" (not a Quadrajet) should be correct for your car, and will accept the factory accelerator and choke linkage, etc.

Carb should look essentially like this one:
http://cgi.ebay.com/ebaymotors/ROCHE...Q5fAccessories

(Though jetting will likely differ for big and small block cas, so you may want to try one being sold specifically for a 330 equipped car). Here's a useful chart for figuring out the exact carb application /number:

http://www.thecarburetorshop.com/Koldsmobile2.htm

Some people don't like the 4GCs, the general opnion being that they have poor fuel economy and poor part-throttle (i.e. just off idle) response. If you do want to run a Q-jet, you will most likely need to change the intake to a 1966 or later version and then deal with any linkage issues.