sounds like lexhaust leak at back of 302some smoke
It runs but keeps trying to shut off.If you slow it down for traffic it don't want to accelerate again.
Start with the basics. A vacuum leak is a good place to look.
Are you loosing in radiator fluid?
Is there any skipping?
And IS engine light on?
It comes on sometimes.
Does not skip just go flat and has back fired.
Back fire is sign of firing loss,check distributor out,may be bad icm on it or bad distributor if it back fire,s.
Changed fuel regulator,gas filter,and rear fuel pump. Also replaced riser pipe and changed EGR valve.
Started out changed distributor , wires , plugs, coil , and voltage regulator.
Ok you changed a good bit, you hear like a exhaust leak,check the intake gasket may have air leak?
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