Re: Holly carb. 55.56

Posted by JWL On 2023/8/4 10:17:09

You will need an adaptor plate to go from the small bolt pattern on the manifold to the larger pattern on the carburetor. Also, you will need to get the model of the Holley with the CFM to match your engine size. Throttle and transmission linkage will need to be devised. Does the Holley have ported and manifold vacuum ports? The Packard distributor uses ported vacuum to operate the vacuum chamber. Also, an aftermarket air cleaner may be required due to the size difference between the the original carburetor and the Holley. I have had good luck using Edelbrock carburetors. They come in a variety of CFMs and are highly tunable. Hope this helps.