1986 Chevy Monte Carlo sputtering

My 86 Monte Carlo SS went to sputtering a little the other day and has gotten noticeably worse over the past 2 weeks. I can still drive it but its very noticeable. I dont notice it until the vehicle has leveled out around 35 and then again around 45 and again around 60 or so. Its worse under load like going up a hill. When I give it more gas it seems to stop or at least stop enough that I dont seem to notice it. I changed half my plugs and wires so far (a "buddy" gave me some plug wires that required putting the ends on so became bigger job then had time for) but this is to no avail. Also, I am not getting as good of gas mileage as I was which wasnt good to begin with but I knew that. Um, just could use some direction; fuel filter, carb, other side plugs and wires (which I plan to do Saturday) or possibly intake. Oh yeah and there seems to be some type of electrical ticking from near the dist. I have an HEI ACCEL added, was on when bought it. But she starts fine and it has always bogged down when I stomped down on it like she isnt getting enough like starved or something, I know this could mean flooding also. Please any help would be appreciated.