Finally, my first 360 and goals for it! I'll be asking a lot of questions.

Nice looking motor!!! I'd put it in the car as is and see how it runs. By the way it can't be a numbers matching 360 from a 73 Challenger because the 360 was used in 74 Challengers (one year only). If it is from a 73 it might be 340:D or a 318:( look on the side of the block the displacement should be cast in big numbers. If not look at the block right under the front of the driver's side head. There should be some numbers stamped that will tell you the displacement.

Either way if it came from a Challenger it's should have a factory performance cam if it is all original.