Today I went looking for a replacement motorcraft carb and after shopping around for a while I found one and bought it. The guy told me it came off a 68 ford V8, the venturi reads 123 or atleast I think its the venturi. Its going to go on a 4.2 89YJ and I know u guys recomend a 108 venturi, Is this going to hurt performance? should I change something? The carb seems to be in very good condition and moves freely, There is a broken little steel connector that helps open the air trap door, Is this carb gonna work fine???