Engine Dyno Questions!

When you go on the dyno, my suggestions are:
1. Know what the advance curve in your distributor looks like. Ask your distributor rebuilder for exactly what the advance specs it has.
A factory distributor of that era had a lot of advance early. You'll want to set timing for a dyno pull by measuring the timing on the engine at mid and high rpm. At minimum check timing at 2800 rpm and 4000 rpm. Plug the vacuum ports on the carb and/or intake. Dont use the vacuum advance for dyno as it plays no role at WOT.

2. From the dyno run, make sure you get power, AFR and or fuel consumption for the entire range of the pulls. Find out what rate the dyno will be run (600 rpm/sec is common but not universal). If possible get MAP.

Here's some threads about dyno pulls. They will give you an idea of the different things people look to learn or accomplish in a dyno session.
383 rebuild - kinda whimpy on the dyno?

How to prepare for engine dyno?

340 on dyno video, whats your opinion

Don't want to spend the effort and money and then be wondering about what was done or measured.
Need Opinions. Have nothing to compare to.