[1974-trans-am]

I have an all original numbers matching 1974 Trans Am 455 (not SD) auto I bought new in September 1973. Just turned 30,000 miles and has been stored several years in heated storage. Replaced original tires, tuned it up with new plugs, points, new fluids - etc. Driving the car several miles and coming to a stop it will shut off like I was turning the key off. Doesn't do it often but always when in traffic. It than turns over fine and after several seconds will start up like nothing was wrong. Doesn't seem flooded - more like no gas. Put camera down gas tank filler and tank is clean with no rust. Fresh gas, lines all ok and fuel pump looks fine. Does anyone have a similar problem? Grounds look good, no fuel leaks, checked coil, new vacuum lines, battery cables good, - nothing obvious. My first post. Thanks for help