As long as your 307 is a non-roller you can do a few performance modifications. If it was the roller 307 with 7A heads your pretty much stuck because no aftermarket intakes will work unless you do a head swap.
Don't bother with performance computer chips. Been there done that and they don't do anything for the CCC 307. I used a Hypertech Thermomaster chip in my old 307 and I think it actually slowed the thing down.
Since the computer doesn't control the carb at WOT there's not much for the chip to do other than adjust your timing a bit.
Some basics I would do is make sure its in good basic tune.
Check your initial timing with a timing light. I found that on my 307 it had been off by 12*! When I set the timing to 20* I found a lot more power (for a 307) than I had before. It felt like a totally different engine.
The timing could also help get rid of the dieseling.
You can play with the secondary rods on the Q-jet also. They are usually very lean and by swapping in another set you can help richen things up. You can also modify the secondary air doors on the CCC Q-jet so they open up further. From the factory they limit the 750/800cfm Q-jet to just 595cfm or so. By modifying them for full operation you'll gain more airflow.
Headers and dual exhaust will help but just don't go too big. 2.25" exhaust should be plenty for a 307.
Of course steeper rear gears would help also if you wanted to go that far too. 3.42's or 3.73's would really help get the big car moving.
The above information is mostly gained from the G-body 307's and I am unfamiliar with whether or not the same exact 307's were used in the B-body's. I would assume so but you never know.
c_creations wrote:
how do i modify the ccc q-jet to its full operation and another thing what is a q-jet sorry for being so dumb but i dont know much about engines yet but im learning.