First engine build.

You have a great book on which to do hour first rebuild. I did my first rebuild from that book with excellent results. I have that book in the garage and ref. it when needed.

A stock replacement pump is fine. No need for a high volume pump.
On the exhaust, this is where you have to figure out what you want in the long run. A set of headers will free up 25 HP. They do not hurt drive abilty.

When it comes to the cam, it is in my opinion that you purchase the entire kit from Comp Cams. Should you need different valve locks, they can be ordered. The complete kit is the cam, lifters, timing chain, matching valve springs, retainers and locks.

Picking the cam;

This can be tough when your doing this for the first time. The cam companies gave me the best advice. Choose the cam for the type of driving your doing. By way of RPM, which dictates the RM range you'll be driving in.

IMO, for a total driver, the XE262 will work great. I have used similar cam(s) durations in my drivers before. It is enough cam to be a spirited driver, no doubt. In that 360 w/3.21's, you should see mid 14's easy and retain good mileage. It is the largest cam to use with a stock converter.

As of right now, check the heads out and see where your current valves sit in the head. There is nothing wrong with the 1.88/1.60 valves you have. If the head has had a few valve jobs before, the valves sink into the head. Not good for performance. This is when you consider new valves.

The guys above make note that a lighter skinnier stem valve is better for performance. While this is 100% true, you'll be hard pressed to feel it or see much at the strip. Let the machinist decide if new valves are needed first.

Bowl porting will add HP. But at what cost? This step, your wallet may dictate. Is it worth 25 HP? And yes, it is possible to add the HP gain up between the headers and bowl ported heads. Just know you'll run in the 14's with stock exhaust manifolds and heads with the 1.88 valves. It's just a little harder to achieve.

Did you have the machinist or did you check and install the distributors bushing in the block? (It will need to be honed out to size for the distributor shaft (E-Z 2 do) the intermediate shaft should be a new upgraded hardened shaft. Inexpensive part. It will last a real long time.

Enjoy, have fun!