You should be fine with your current combination of VT parts. It WOULD be ideal to have guidplates and poly locks. (Neither are necessary here, though.)
The only "very critical" issue you should face is the PR length. (There are lots of great write-ups on that, so I won't "muddy the waters" with another.)
My rocker adjustment procedure is a little different, dirty and more "hands-on".
I set the PR's up a little loose. Start the engine. (I know, yours isn't in the car yet.) Let it warm up completely. Pull the VC off, start the engine. (Caution! Low flying oil!!! I have a special valve cover that I put on.) Tighten all the rockers till the valves are just barely staying open. (The engine will stumble, a little.) Back off each a 1/2 turn from there. Then, back off every rocker (only one at a time) until it makes the clacking noise. Tighten till the noise JUST goes away and another 1/2 turn and that's it. (Repeat last two steps 15 more times.)
It is a very "entertaining" process. Lots of oil smoke and odd noises but, completely effective. (And COOL, too!)
As far as people telling you that you should get new rockers, they may be right. Rockers, though, can be swapped-out in an afternoon. So, I wouldn't be terribly worried about whether they offer enough "performance" for you. They'll certainly get it on the road. SPRING is coming!
