I think my generic GM 1-wire on the drag car is about 50 amps.
Runs the MSD, water, fuel, electric fan, headlamps, brake lamps, gauge lamps & tach fine with 2 normal Group 24 batteries.
I run a digital voltmeter and it's never under 12.7 no matter what.
Normally that increases after every pass.
Quick Google search shows the Denso 90 amp units as cheap as $73, mostly around $100.
As far as being the Race section, lots of guys post here for street/strip stuff, so an application/usage isn't necessarily obvious.