Water injection today is not the same as the old Edelbrock Vari-Injections. Technology always moves forward.
I doubt the folks running these modern water-meth injection are saying "don't waste your money".
There is some interesting new systems out there, most made for boosted engines. You have to look for old school NA carb water-meth systems.
But it does work, dyno proven .
https://prometh.com/collections/carb...ts/mist-a-carb
https://www.summitracing.com/search/...ection-systems
Here is a MT article on a boosted 302 in a 65 Mustang.
https://www.motortrend.com/how-to/ho...onation-blues/
428 Pontiacs, that 390 HP 428 had the highest horsepower of any Pontiac production engine.
With D port heads and cast pistons. It should have been in GTOs and Firebirds. Chevy had 427s but we could not have 428s ?
And just think is we would have been allowed to fight fair with high CR 428s and 455s with forged rods/pistons and RAIV heads and the rest of the goodies ?