I have a 69 c60 with 11000 miles (fire truck). It has been sitting for some time but I am trying to resurrect it. It runs but carb will not hold prime and it burns black on the right bank. I contacted Holley for efi upgrade suggestions and they will not advise as it is the governed system. I asked if an hei ignition system could control the overspeed issue but they will not talk to me about it. So I am just thinking about tuning things up for now and keeping it original. No interest in making it a street rod. Any input on the tall deck issues is welcome. Thanks.