How tight is correct for the timing chain?

Okay I probably should include some additional info to better explain the situation. It is a big block 383 B engine. The engine was built about 15 years ago but only has about 12,000 miles on it. At that time the cam was degreed. Keep in mind I’m learning a lot of this as I go along so excuse my ignorance on some things. That’s why I ask so many questions and youtube instructional videos have become my friend. Before I broke it down it ran great dynoed at 340 rwhp with stock 915 heads, approx 9.8 to 1 compression, basic Keith black HP Pistons, Harland sharp roller rockers etc. I decided to do some upgrades on the engine. Move up to edelbrock performer rpm heads and buy a geometry kit for the rockers from B3 racing engines. Long story short one thing leads to another when you tear into an engine and while it’s apart for durability I wanted to try and freshen up whatever I could that wasnt crazy expensive. I’m hoping to be able to take out the cam and get it notched for better oiling to work with the new heads and reinstalled rockers. What I don’t want to do is mess anything up but instead pull out cam, pull out distributor and gear drive, fuel pump and then reinstall everything as before. I though if the timing was set on TDC correctly then I can just time it and have a great running engine. So I thought I had lined up my timing by looking at the gears for the crank and cam at TDC based on the markings. I would take everything apart carefully marking everything and reassemble no problem easy peezy. But now I’m totally confused and don’t know what I did wrong? If I rotate the engine one revolution at the crank then it moves a piston up and down twice. Either on the compression stroke or power stroke. Am I on the power stroke and should be on the compression stroke therefore I have to move the crank one revolution? If I do that wont the gears move around once and then the dots should line up again and be close together as long as the cam was degreed when first assembled? I can then remove everything and put it back the same, making sure the distributor points to the correct piston? Then my rotor on my distributor should point to cylinder #1 at the top of compression stroke where now it is pointing to cylinder #6 at the top of the power stroke. Did I get it? Sorry I don’t mean to be so rudimentary in my understanding this is my first engine tear down.