I've seen A LOT of posts about making HP with a 318-So why is it so ???

Stock 318's have around 340 stock.

Well, the magnum headed one Dulcich did years ago, that made 400hp...... made 382tq.

And the 420hp 360 I had on the dyno last year made 419tq.

340hp 340 made 378tq

331hp 360 made 367tq

I’m confident a mild 318 making around 320hp isn’t going to push the tq needle into the 450ft/lb range.
Not on the dyno here anyway.