That is a runner. if that was the first start in 20+ years sounds like you are in good shape. And you have proved to many guys that hopefully will read your post that taking the time and doing the steps to start a engine that has been sitting are well worth it. too many just try and fire it right up with gas and get frustrated. You follow the basic steps and got rewarded with the awesome sound of straight 6. enjoy that 56 its my favorite year.