cam choice.....

This is a new build. I don't have the cam yet. I'm trying to figure out the best cam for my existing parts. I used to run a stock lower end in my 68 satellite with the .484/ .284 cam, a stock 340 intake and mild pocket porting and gasket matching. That car went 13.02 with no converter and a 3.23 gear. So from the sound of it the .484 is the best bet to run.
In reference to "install it at 100" can someone explain that to me?

No converter huh, so was it a stick? :D