I have two 750 holleys for sale, one vacuum on mechanical. One Holley 650 vacuum. One demon 650 mechanical. All carbs should be gone threw, the 650 demon was just rebuilt but we couldn't get it to run right on either of our boats so needs to be rebuilt again, has less than 10 total hours runtime since new. The Holley 750 mechanical I have no history on, picked it up used and never touched it, one of the bowls says "hardcore" but it looks like it has two different bowls. The Holley 650 and 750 vacuum secondary's were both running when I took them off, but have sat for a while and should be rebuilt. Holleys 100 each obo, demon 150 obo.
marine power center rise polished manifolds and risers(same as imco thumper) I purchased used and put in new gaskets, ran them in my last boat once and sold the boat. They look nice but I can't use them under my doghouse engine cover so they need to go. 600 OBO.