Cool.... That is very important...
For some of this, it would help to figure out how post a picture...
Next identify the engine. In fron of the head, there is a flat spot where the block extends about 3/4" Hopefully there is a number stamped there. If it isn't there, you have to climb up in with the engine (Remove the breather). The lip where the bell housing bolts to the block. Should be a number there if it wasn't in the front.
Next pull a valve cover and get the casting number for the heads. It will be in the area with the rockers. While you are looking in there, see if there are rollers for the tips of the rockers where they meet the valve.
On the intake, since it is aluminum, magnet did not stick, right? There will be a manufacturer name and style name. It will say something like Edelbrock Performer. This will tell us what the performance characteristics of the manifold.
What type of distributor? Guessing it is HEI but may nto be. Is the coil square and in the center of the cap?
Carb - is the overall shape kind of rectangular front to back? It could be kinda round. If rectangular then probably a Holley, if not then Edelbrock or Rochester. I don't know a lot about Edelbrocks and Rochesters other than I usually change them out rather than rebuild. Never learned that skill to really tune one of those. If it is Holley, then there will be a number stamped on the front of the air horn. Need that number.
Last item, Headers... Where do they end? Do they hookup to the exhaust right by the side of the block, a little bend towards the back or drop down, go back about a foot and then hook to the exhaust pipes? What is the Outside Diameter (OD) of the tubes and then for the collector?
Bet you thought it was summer break and no homework...
