318 .40 Over..?

To answer your question;
I chose 40 over, making the engine 4.04 x 3.58, thus making it equivalent to a stroked 340. Cuz everybody at the car-shows knows that a 360 is a dog, and a stroker-340 is the cat's meow.(NOT) So then, eventually, I stuck my one and only track-ticket in the window, showing 93mph in the Eighth, and that was the end of the trash-talk.
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additionally;
I once had a seemingly unsolvable overheat issue, that turned out to be tight ring-gaps. All I did was tear the engine down, had the machine shop hone out the cylinders another one-half thou, open the ring-gaps, and reassemble it. Instantly it normalized. This on an 360 at 40-over.
The first trip around the block with the bigger ring-gaps, I knew my troubles were over.
Over the following weeks I increased the minimum coolant temp to near 200*F. Right soon after that I added a Thermostatic fan clutch to a 7-Blade factory A/C fan, and the engine has run 205>207 by IR gun, ever since.
I mean I had tried all the usual stuff.............. Hi Flow pump and stat, 7-blade direct drive fan, straight water, lots of timing, a 7-qt deep-sump oilpan, ventilating the hood, all molded hoses with the lower one having the anti-collapse spring in it. The only thing I didn't try was water wetter.
Prior to that;
she would heat up in traffic, run hot on the hiway, couldn't idle it without the temp-gauge rising, and EVERY TIME I shut it off, it would lock up for 15>20 minutes, until, with the hood open, it had cooled down enough so that the brand new Dakota starter could crank it. then as soon as it was running, I got it up to speed, for ram-air assist.
Afterwards;
the bonus was that the car gained a bit of power, and the tune stabilized, I was able to idle it way down, and the fuel-economy went UP!.
It was awful hectic that summer, but the next spring, it was all worth it.

And then, I cut a hole in the hood, and sealed it to the carb....................