Hello: I am looking at 2 kits to use on my motor with a Holley carb. One is the INNOVATE 3822 G5 WIDE-BAND AIR FUEL GAUGE LC-1 KIT
They include a bung for the O2 sensor that is welded to the Header collector pipe, then the Bosch wide band O2 sensor is installed with the rest of the kit. This will give you the air/fuel ratio from inside the car.
The other kit is the Percy's Adjust a jet metering block that installs after the jets are removed from both primary and secondary metering blocks and their metering block is installed in front of the original, then float bowls reinstalled. Here is a video that I attached so that everyone can see how easy it would be without acess to a dyno.
I figure with both of these installed and since I travel within Arizona, from 300Ft above sea level, to well over 7,200Ft, this could prove very effective on a carb driven car...Especially when adding a Water/Methanol injection system like I already have built and installed...
I will probably not have the motor done until June, or July, but I will do a video if anyone is interested