I want to drop the Computer Controlled carb for a Holley or Edelbrock carburetor on my 84 L69. What parts will I need and what will I have to do to make this switch?

 

First question: Do you have emissions testing/inspection? If so, don't do it.

2nd question: Why do you want to do this? I certainly wouldn't recommend it for a street driven car, especially with an automatic.

Now the answer: Carb, either intake with square-bore mount pattern or adapter, and vacuum/mechanical advance distributor. Also, some means of locking the torque converter clutch (either a manual switch you control, or a conversion kit).

If you do it, you'll notice a drop in mileage (at least from what a properly operating CC system will produce). Driveability will likely not improve. If you buy new non-CC parts (carb, intake, dist), the cost will be more than it would to get any but the most messed up CC system running properly.

But, it's a free country (except in the smog *****' view...).

 

I wanted to do it because if I thought it'd be easier if I dropped a 350 in eventually to not have to worry about reprogramming all the computers.

 

The CC carb system will be just fine with a 350. A 350 knock sensor and module may be needed, but that's minor stuff (some guys say theirs works just fine with the 305 module, others, typical EFI guys, say they needed the 350 KS to get it to run right).

You may need to tune the carb secondaries with different rods & hanger. That's nothing unusual, and doesn't involve reprograming the computer. You'll be in for a lot more tuning hassles with a non-CC system on a 350 than you would be with the CC system on a 350. Assuming you keep the cam duration reasonable, that is, and the Comp and Crane compucams will both keep the computer happy and make a good running package.