The 97's I have do not have this feature. Cost is important. I have no intention to buy new carbs when I already have 97's, and some 94's as well.
I purchased 2 of the Chevy conversions from Bubbas hot rod shop they work great in both flattys sent from a wooden box with a crank on the side
I used a pertronix in my old 40 coupe flattie - no problems other than my own stupidity. I would suggest a Pertronix II unit - I have this one in my avatar's crab dizzy. Got it from Bubba's and I use a ballast resistor - seems to run great with it .... good luck what ever way you go ...