Car getting real hot....

Ok as always, I take the people's opinion and thoughts on A Body cars here akin to biblical.
As stated I will listen and follow on your thoughts.
I hear what you are saying, especially on the shroud, fan, cap etc... but can you someone please tell me why I never, ever, had this problem.
(Started after the engine rebuild last yr)

In fact I used to have friends that did not like coming to where I would hang near my place (having mostly Chevy cars there did not help lol) because the traffic was heavy coming to the port.
I on the other hand I would be in traffic, bumper to bumper and never had the Guage go over 160 (without a thermostat as well)

This is just as bad (sometimes worse) not knowing why it didn't overheat before, compared to overheating now.
I just don't let it get passed 200-205 degrees and I shut the car off.

Until now it's never overflowed into the canister next to the rad that's been on the car from day one of the restoration and no water had ever been in it (overflow from overheating, etc)
Again, thank you all for all your input so far.
I'm going to start with the cap they had on the car and slowly change one thing at a time. Changing too many things at once I've come to realize brings other problems and you don't know then what may have caused it.

In fact I was to swap headers and I haven't done that yet. Thank God cause I would have thought maybe that's causing the problem now.
Lastly, I thought maybe the water pump has become defective. I don't know. Zoi this is why I am asking and trying to learn.

I never thought things can just go "kaput" with no warning but last year I had a problem (again asked the pros here) that when I was in 3rd gear at about 2800 rpm the car would start to shake hard, the transmission really. It felt like it was coming from there or the rear end would start shaking/vibrating something awful.
I was told a few things. I started with checking to see if the driveshaft was balanced.

I could not for the life of me deduce how you can park the car for winter storage in Oct. The car is running fine and then come April you take it out, rebuilt engine too as mentioned earlier and now it's vibrating for no reason. It's not like the car hit/dragged the shaft on the ground etc.
I went and had it checked and balanced and the vibration just went away. This is how I started to realize somethings don't need to give you ample time to know something is coming down the pike. They just do. Therfore the water pump just dropping dead does not sound far fetched to me any longer. lol

You guys are great.
Thank you.
MAPS


Well the engine was removed changed cam the heads were redone asking with that the crank was changed only things used were the pistons add the engine had been rebuilt original a few yrs earlier but had really low mileage (less than 3,000 miles) after having a problem with a lifter dropping I decided to take the engine out and redo it the way I wanted to, lime I said different cam, heads, lifters, valves etc.. The only part that remained the same were the pistons and the induction,
The car never went above 160 before that's why I was thinking, maybe the water pump went ?
Thanks.
MAPS

Don't guess and think for a second or two.
You changed things and now have issues. Never mind the car aged a minute amount.

Did you use all the same gaskets as before? What else got changed. Do the rewind in your head and do not get reactionary at this point, it usually makes it worse and more expensive! Did timing change or does it need too with the new cam and such! Assume you checked those basic items.