Weber Intial setup - back to basics help

[SF_SN888KE]

Z, I could sync carbs 1 (has the main idle screw - passenger side rear) and 2 (passenger side front), and 4 (driver side rear), but not carb 3 using the linkage. Carb 3 was low (or carb 4 VERY high) on manometer. Could not sync carb 3 and 4 using the linkage between them. I tried flipping the adjustments/linkage between carbs 3-4 but there was no space and I couldn't figure it out. If I set the cross linkage (adjusts the left /right bank) to carb 3 (e.g. 7 on manometer), then carb 4 was WAY too high (at 12 on manometer). The adjustment screw for carbs 3-4 seems to effect carb 4 - and I backed it all the way out and carb 4 would not drop and was still too high. Hence, set carb 4 to 7 on manometer and then raise carb 3 be adding the idle screw.

As I am writing this, maybe there is a way to flip the adjustment screw (carb 4 adjustment) with the spring stop (I think this is connected to carb 3? need to take another look)

As you mentioned, that is my concern - sync'd only at idle but what happens when you accelerate? Will carb 3 always lag behind? I guess I can try to raise the main idle screw to 1500 rpm, 2000 rpm and then check the sync?

Anyone else have this problem of sync'ing a high or low carb? How did they do it in the old days without the fancy linkage?

Will check the sync with higher rpm, and then with new plugs ... when I have more time.