440 Harmonic Balancer Timing Marks Off

I appreciate the concern on the degree issue which as I stated I planned on doing initially. but I do agree with Marcohotrod that degreeing a cam is good practice but not absolute for average street muscle car. That being said this is my first engine and I am sure those speaking know A LOT more than I do. I do however think at this point I should tear down the front, take the timing chain off, make POSITIVE I am on the TDC of the #1 Compression stroke and reassemble.. I do understand that IF I am on the #6 stroke that I should be able to set the distributer at the 6 cylinder and make that my #1. correct? - p.s. I do believe all parts are same year/engine. bought it assembled but obviously cant make certain years ago something wasn't changed. Please have some mercy haha trying to do this right and also learn.