By the time you add up the cost of a Walbro carb, the carb adapter, needle bearing conversion parts, and the ignition system, you will have enough investment to buy a "real" gasser.

If your question is whether it is possible to do a gas conversion, then yes.

If you're asking whether it is economically feasible, then no.

Also, CH ignition used to sell parts for needle bearing conversion for the Big Cats, but they say the stock rod is not hardened enough to take the needle bearings. Maybe some of the older Tigres have hardened crankshaft. FWIW, I have a newer Chinese-made G2300 and the crankshaft show signs of heat-treating, whereas my older (but still recent manuf) Italian-made G2300 does not.