I'd hate to tell you its the distributor and not have it run any better with a new one..
..judging by the looks of your old coil,I'd say the rest of the ignition parts might be just as bad or got wounded when the coil was dying..so a new distributor wont hurt anything but your wallet,its cheaper to buy one complete than piecemeal all the parts in one nowadays probably..your old one may have worn bushings letting the shaft flop around too..and rusted advance weights with worn pins..
A carb usually either works good or not,its not often one acts up intermittently,or just at a certain rpm..that is usually an ignition problem..but its possible,ethanol can cause a lot of internal weird carb issues..a bad accelerator pump shows up only when you open the throttle,it'll bog ,then recover and speed up..I dont think one affects "cruise" much once your up to speed..
Bad plug wires usually show up most under a load,eventually they will cause misfires at idle when they get old and spark can jump thru the insulation to ground..
You can check the fuel pump pressure and volume with a gauge and a cup,I have not had many mechanical fuel pumps fail,the few that did made the engine die and refuse to start again,first thing I noticed was the truck wanted to bog out going up hills or when flooring it from a standstill to merge onto a highway..engine would recover when I let off the gas pedal..
..judging by the looks of your old coil,I'd say the rest of the ignition parts might be just as bad or got wounded when the coil was dying..so a new distributor wont hurt anything but your wallet,its cheaper to buy one complete than piecemeal all the parts in one nowadays probably..your old one may have worn bushings letting the shaft flop around too..and rusted advance weights with worn pins..A carb usually either works good or not,its not often one acts up intermittently,or just at a certain rpm..that is usually an ignition problem..but its possible,ethanol can cause a lot of internal weird carb issues..a bad accelerator pump shows up only when you open the throttle,it'll bog ,then recover and speed up..I dont think one affects "cruise" much once your up to speed..
Bad plug wires usually show up most under a load,eventually they will cause misfires at idle when they get old and spark can jump thru the insulation to ground..
You can check the fuel pump pressure and volume with a gauge and a cup,I have not had many mechanical fuel pumps fail,the few that did made the engine die and refuse to start again,first thing I noticed was the truck wanted to bog out going up hills or when flooring it from a standstill to merge onto a highway..engine would recover when I let off the gas pedal..
