problems running

[mechanic350]

so ive had my 72 swb chevy for a few months now and it has been running great. no issues at all. and in the past week it has started sputtering while im driving and then dying. sometimes she comes back on her own other times i have to start her back up after keeping my foot on the gas while i turn her over. i just swapped the spark plugs this morning and put carb cleaner in my tank to see if that would help. i have new wires too. my only thought at this point is that because the fuel filter is before the fuel pump that it is some how not getting enough fuel in addition to possibly dirty fuel and a dirty fuel filter. any thoughts on other causes would be great help.