Wideband o2 for tunning

[451Mopar]

It's a slippery slope, First an AFR gauge and next thing your installing EFI

 

[themechanic]

You could install the Carb Cheater and just let the computer adjust the AFR automatically for around $500. It works on any carburetor.

I have not used one but it sounds like a winner for a novice and it's quite a bit cheaper than a fuel injection conversion.

Thunderhead289 sells them.