273 V8 spark wire routing, looms and grommets

Well this one fails leak down in #1 and smoke a little so its days are numbered. Registered the car today to drive and have fun for awhile as i gather parts and supplies for a tear down for restoration. Will eventually have to deal with motor. Guessing that finding a correct date code block will be difficult. At least one that hasn't been bored past making it worth an attempt.
Anything wrong with your block other than it has a weak cylinder? It may very well be original/standard bore and can be easily rebuilt.