Hello all. I'm new here, having issues with my 83 Rampage. Not positive on if I have a 5520 or 6520 holley. And what styles/types came in what years. I bought a reman off of eBay for cheap, and the connections/wires do not hookup nor match up. When I start the engine, it has an erratic high idle. Only adjusting timing can bring it down to 1500rpms, and it should be around 900, and when it's at 1500, its a rough 1500. I am just not sure where to start or what I'm doing wrong.