Fuel frothing is an engine balance/design/tuning issue. V8s are inherently better balanced than a 4 cylinder. 4 cylinder engines have balance issues that can only be solved by the addition of balance shafts. As auto engines are rubber mounted, balance shafts are seldom fitted unlike in modern motorcycles.
Tuning is a factor as well as fuel frothing is an issue with high rpms. The most well known example of this is the MGA twin cam. The push-rod engine didn't rev as high and had no problem with frothing. Unfortunately MG didn't figure out what the issue was until after the engine production was cancelled. Had they, the MGB, and MG itself, might have had a completely different history. Now MGA twin cams have flexibly mounted carbs and no issues.