340 4 speed can run , reliability

I had a 73 340 Cuda I drove everyday back in the mid 80's, clutch fan went through the radiator and all i could find was a 6 cyl radiator, I put it on temporary because I needed a way to go and it ran cool with the 6 cyl radiator. I finally found another correct radiator but i believe it would've been just fine with the 6.