tune help

Your fan needs to be close enough to the radiator that you skin your knuckles on the radiator fins putting it in. And then you need a shroud. Your cam timing of 233/240 @ .050 on a 110 LSA. Just curious what cylinder heads are you running?
As far as tuning, you need one of these and some quality time with your carburetor. Directions and several tuning baselines are in the kit.
Performer Carburetor Calibration Kit #1479 for #1405 Carburetors
You’re probably going to have to go over ignition curve and make the vacuum advance operable, too. I’ll post a link to the ignition tech page here when I find it. And, Your engine would probably do better with a larger carburetor, but what you have may provide a good tuning lesson. I would be looking into at least 700 cfm in a 4150 (double Pumper) or maybe a Holley 3310 750 vacuum secondary.