68 Barracuda 440 getting hot in traffic

Guys, it's not a stock radiator..the car was restored in 2006.
As far as the car actually boiling over it didn't but the longer I sat there the more the temp creeped up until I shut it down.
I bought the car and didn't get enough info on the engine build.
It definitely has a decent cam in it but I dont know the specs.
When I bring it back tomorrow from the car show I'll let it sit while running and actually see how hot it gets with a temp gun... didn't want to do that at the car show with all the chevys around!

20200116_155520.jpg

20191120_154119.jpg