Biggest mistake ever- lunati cams

Once the intake opens and the piston comes up, that's when it is tdc correct? How do you figure out the 30° with rotating the distributor? Also will that be clockwise or counterclockwise? I always just lined up the cap with the rotor, fired and set the rpm then grabbed the timing light. If there is a better way, I would want to know. I realize that is crucial. Everything will be primed and visually checked for oil before I start it. I have a Holley 750 black diamond series which was more costly than a brawler and used the brawler on my last motor which had a leaking float right out of the box. It stayed running but eventually started flooding it.
Yes put the damper on tdc compression stroke. If you are not sure remove #1 sparkplug and put your finger over the hole while bumping it over. With the cap on the distributor mark the dist housing at #1 and #8. #8 is the next terminal clockwise. The terminals are 45 degrees apart. Half way between the terminals is 22.5 degrees. Line the rotor half way between the terminals at 22.5 degrees. Considering some amount of centrifugal advance will be added when it starts this should get you close enough to get it fired off then you can fine tune with your timing light.
Can't stress enough known good carb.