Ahem
Nissan S20.... the early one came with triple weber dcoe 40 sidedraft.
Nissan L24... came with dual sidedrafts
Do I need to mention toyota 18rg, 3tc, or 22r?
4af is pretty weak when it comes to factory carbed engines... it might have a bit more potential but it isn't amazing.
I didn't even mention the japanese carbed bike engines, yamaha used carbs on bike motors even up to 2005 I think on the fz1.... These are 1000cc motors reving over 10k rpms. Which is a whole nother level from these old carbed engines.