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

PRH said
I said torque.

It’s a whole different ball game.

If you can carry that stock 340ft/lb all the way to 6500rpm, you’d be making 420hp.

It’s easier to increase the HP than it is the TQ, if you’re not making the motor bigger.

For big HP gains, you try and make more TQ....... and move it up the power band.

340ft/lbs at various rpm = HP
2000- 129
2500- 161
3000- 194
3500- 226
4000- 258
4500- 291
5000- 323
5500- 356
6000- 388

Yes you did. And I got talking about a 30% increase in horsepower. Like I said 3 times now, I don't have a dyno, you apparently do or have access to one. All I have to go by is a computer program. They are no more accurate and consistent than everybody's dynos or flow benches. This is what was programmed in the software. Now, I am just repeating what was on the screen.