Fuel filter/fuel pump/old worn-out carb.  If you smell gas, check fuel
hoses.    Could be electrical:  ignition module/coil/wiring at coil.  I
had similar problem with my '81. Turned out to be a factory defect in
the wiring to the coil.  The wire terminals were crushed and that cut
most all the wire-strands feeding the coil....was working on about 4
strands.  Put on new terminals.....been good ever since!  This prolly
isn't your problem though.....mine was back in '81.

So, either it's getting gas, but it isn't being fired or it's getting
fire but no gas.

Dave S(Texas)