[Carl's 68]

I recently bought an 87 Chevy Suburbanand it stalled on me today while waiting in line at a gas station and would not restart until nearly 30 minutes later. It has the TBI 350 in it with all the control module stuff. I think it may be the Stator and pickup in the distributor or the ignition switch When it restarted it ran like it should then when I got home from there is stalled again but restarted immediately. Any input would be appreciated.