Well, we agree to disagree or something kinda like that. How are your mechanic skills? Do you have the special gismos needed to do a complete tear down (maybe that is the wrong word here---how about take down?) of your new powerplant? If sooss, and IF you really want to have a winter project, then how abouts you taking your new (to you) Detroit all apart for a detailed look-see?
And...never start a paragraph with a conjunction. No...wait...what I mean is that then you would know exactly what condition your mighty Detroit is in. Have fun. Learn a new skill. Go back with new bottom end bearings, new rings and maybe a set of rebuilt injectors. Perhaps bigger ones with "A" timing would be appropriate if you think you need. Enjoy it. (and stay warm!)