There is no question here. EFI is better, well the more advanced version anyway.
Carbuerated engines are cheap and easy to build. The technology has been around for a long time. The expense factor and the ease of modification are the only points worth noting in it's favor. They are inefficient, poor at maintaining tune, problematic, and difficult to diagnose on emissions equipped cars. ie. What vaccuum line is causing the problem this time?
TBI is a piece of crap. For performance anyway. Nearly impossible to upgrade, but much more efficient, more reliable, and good at maintaining tune the TBI systems are significantly better than carbs on cars that are not prone to modification.
MPFI is far and away the best design. Although more expensive, it's extremely reliable, maintains the correct tune even when weather totally changes, produces significantly better performance, is easy to increase performance with, and it's super efficient.
I find the argument that MPFI produces more low end and slightly less top end to be null and void. Make a custom intake for it. You can change runner length. MPFI is also damn near as cheap to modify for the 5.0's too. You can make 350hp on an SEFI 5.0 for an additional $100 or less versus a carb 5.0 car. Going beyond that the expense increases for both.
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