What to use to clean this carb?

rumblefish360 said

Oh wow! An old Holley two piece carb. Like the old Ford Motorcraft carbs IIRC. I had one a long while back. Not a bad performer. Is that a spreadbore or square and what size?

Being that it is aluminum, treat it as such. But the finish will never be as new again. You can rub on it some with a cleaner and polisher which will have it looking good but the aluminum can be stained and discolored which will not come out.

I’d like to find the big spreadbore version again.

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It is a 850 spreadbore. A friend bought it new when he changed the intake on a 440 and it always was super lean so he gave it to me for a project. His problem wasn't the carb tho. He used the valley pan as a gasket only and had an intake leak. Its been in the basement for years and I was going thru stuff while the stay at home deal is going on.
I thought that style would make it easy to change jets without draining fuel bowls. Make an offer if your interested. I'd consider letting it move on to another mopar enthusiast.