I do not think the distribution will be as bad as some people think.....
Because of the very thick spacer/adapter. That distance from carb exit to manifold plenum is going to give the air flow some 'breathing space' [ pardon the pun ] & allow it to stabilise.
Sorry, but by your remarks you have very little experience with fluid dynamics because if you did you wouldn’t say what you say. There is a difference between plowing new ground and going against physics. What you are doing is incorporating huge exit losses at the carb and the spacer. Then putting the hose on it? I guess you need to learn for yourself, but you could save yourself much grief if you spent the next 30 days looking at exit losses, Reynolds numbers (which relate directly to turbulence) and watching some of Darin Morgan’s videos on his YouTube channel. Once you confound fluid flow it’s nearly impossible to fix it. I’m saying once you get the air and fuel around that mess of a spacer/adapter the mixture will be so chaotic the intake manifold and ports will have to live with it. Then, you will see that chaos on the plugs, especially the ground wire. You will have a combustion chamber that will be highly stratified. You will get detonation when there shouldn’t be any. You’ll add fuel and it won’t matter. You will pull timing and it will still have issues. The tune up window will be needle thin. That’s just for starters. You will do what you are going to do. But 30 days of study would help. I’m out.