I have a foot injury that makes it difficult to operate the secondaries on a DP. I have 30 km's each way to get methanol and my local track closed a couple of years ago with zero notice. My nearest track is 5 hours each way. One of my crew guys has just finished the resto on his 65 Nova super stocker so I only having one regular guy I want to make my life easier so petrol carb. When I started racing in the 1980's I ran a 3310 750 Vac Sec and after it was set up with a secondary metering block, no power valves, wire restrictors etc it had dynamite throttle responce and ran clean as a whistle. I ran 9.70's with that on a very basic small block Ford. The difference was track time
I don't see why this 870 won't work just as well given sorting