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

I guess it depends on how close to reality you’re looking for.
Off by 120ft/lbs and missing where the tq peak will occur by 2000rpm seems like it’s too far off to be of any real use to me.

I’ll try that 360 on my 20 year old version of DD and see what it says.
That would be interesting. I have an old version as well but no computer to run it on. I think it ran on Windows 95. LOl