I know it's popular to run a stand alone on EFI cars, but what about a carb application?

I run my car always on 93 octane, but figure I better put some race gas in when spraying.

 

I run a separate fuel system for my nitrous with race fuel or av gas.

 

Carbed or EFI...its extra saftey measure to have and will save you from dumping 2-3 gals of race fuel into the main tank. Get a 1gal cell, only use it on the spray, 1gal will go along ways. If you race enough, the savings on fuel alone can pay for most of the standalone costs.