Might be a fuel delivery issue, but it also could be electrical...
I had the same problem on one of my cars many years ago.
Turned out the wire going to the points was shorting out against the distributor shaft.
That would kill the ignition voltage and shut it down cold. For some reason, it would only happen on right hand turns!
A short in the steering column/ignition switch harness could cause the same problem.
First thing to do is verify if you have fuel and spark when this happens, so you don't waste a lot of time looking in the wrong place.
Will it shut off when you turn the wheel while the car is stationary, or does it only happen when the car is in motion?
1968 Pontiac GTO
1983 Pontiac Bonneville (G) wagon
2008 Pontiac G8 base