Max, ask any questions that you can think of. I have been out here lurking for about 6-7 years myself and know a few things about the 64-66 series Tbirds. I have asked Mark many questions myself, but also know quite a few things from learning the hard way. One thing that I will say is that if you do all of the work yourself, you will never regret it. You will be an expert on these cars within a six month period, if you do the work yourself.
I'm running a 66 Tbird with a 390 that is dynoed at 450hp. Ed rpm intake, ported CJ heads, cross bolted mains, fresh air intake, custom headers that I fabricated, 10.5x28 MT rubber, 75hp shot of nitrous bringing me over 500hp, and many more "little" things to make it go quicker.
If you are looking for little things like rocker assembly end stands or camshafts, you can't go wrong with the vendors that are linked to this site. I will testify to Doug at Precision oil pumps as someone that you may want to use. Good luck with your engine install. Putting a FE into one of these cars isn't really that hard. My wife has watched me do it about five times, when one day, she asked me if she could pull my engine. At first I thought that she was refering to something else, but she actually meant my TBird engine. I removed all of the hardward, and disconnected all lines, and had her lift and guide the engine out of the car. Best move that I ever made! Get he involved!!
So ask any questions that you have.
Dan
