Re: Carb question Need answers tonight

Posted by Eric Boyle On 2008/8/2 1:40:11

The innermost 4 bolts on the Edelbrock carb are the same as the stock Packard 4 barrel. Now, if you used a 500 cfm carb, you'd only need to either use a 1" spacer plate, or cut off the lower end of the thottle lever on the carb, as it hits the intake. With a larger carb, 600 cfm or higher, the throttle blades on the secondaries are larger than the Packard intake manifold openings, and on the 750 carb, they're both the same size, but still larger than the Packard manifold. Now, you can bore out the secondaries to match the Edelbrock carb, and I recommend this. With a 750, you'll have to do all 4 mainfold openings. You'll still have to use the spacer plate or cut off the throttle lever no matter what Edelbrock carb you use.

Personally, I have found no better carb than the Edelbrock, for ease of tuning and simple construction. If your car is going to be a driver, then I'd HIGHLY recommend putting on an Edelbrock carb, and saving the original carb back in case you sell the car. You'll be happy you did, as everytime you rebuild a carb, that's one less life it has to live. (Meaning it just gets even more wore out)