I have a 79 chevy custom deluxe c-10 and it keeps overheating...?

ive flushed the radiator, replaced the thermostat, changed the radiator hoses and still over heating it could be the water pump but i was wondering if there was anything else it could be?
I have a 79 chevy custom deluxe c-10 and it keeps overheating...?
does the fan work? is the front of the radiator clogged? Is there any air in the system? Insteadf of water pump are u sure the belt has proper tension and isnt slipping?
I have a 79 chevy custom deluxe c-10 and it keeps overheating...?
could be a few things first of all did you look and see if the fins on the radiator were clean so air can flow through it? is there a fan schroud ?is there a clutch fan ? if so is it working properly ? is it only overheating on the highway or in traffic? when you start it open the radiator cap (when cool) and let it run and look inside you should see water flowing after it warms up . if not something is blocked inside or the water pump.
Check the ignition timing. If it is too far advanced that could cause overheating.
NEVER replace any part till you KNOW the problem. Never flush the radiator it is waste of time and money. Take your car, or if you know how, remove radiator and take it to a RADIATOR SHOP and have it cleaned. No amount of flushing will help. It must be taken apart and cleaned by the shop. Cost me $60 to get mine done.
As Robbie suggested, timing. But usually the distributor hold down clamp has worked loose, allowing the timing to go retarded. If it was advanced, you'd have starting problems and severe detonation. Check with timing light, idling, with vacuum advance unhooked and the line plugged off. Set at 10*BTDC. If you experience detonation on hard acceleration, back it off a few degrees and retry until the ping is gone.