overheating issues - 79 k10

[tommartin]

Ok guys I need some help here.

I just put a 350 in my truck and its running hot. I tried to use all original parts, so it does not have any performance parts on it.

After running for about 5 or 10 minutes the temp light comes on, and it will over heat if I’m driving it, so I don’t think it’s just them the temp sensor.

Here is what it has:

New thermostat
New water pump
New upper and lower radiator hoses
New heater hoses
New radiator
New radiator cap

The fan is running and seems to be moving air rather well
I do have my shroud on
Exhaust seems to be flowing fine, no blockage, after they Y pipe it has a muffler bolted up.

Oil seems clear of any coolant
It’s been block tested

One thing I did notice that my exhaust manifold on the passenger side that has the EFE valve on it got hot enough to glow, I did check to make sure the EFE valve is open also.

Outside of what I mentioned what else would be good to check?

Maybe I just need some electric fans?

Thanks for any help.

Here are some pictures: