As far as the Dyno 2000 software, It is marketed by Mr. gasket Co., no small player in the industry, here's what one reviewer said:
"(*****) Five Stars. This is by far the finest engine dyno simulator I have ever used. After using this program to extensively model my LA-318 just after its most recent rebuild I must say that it is the best, most economical choice for novice to pro. What really made the program work so well for me was the ability to compare multiple camshafts in the same engine. To do this, I got specs from the Melling MTD-1 cam (as installed) along with two Mopar Performance cams, P4452757 and P4452759. Once the three simulations were created and properly setup, the six power and torque curves from all three cams could be combined on a single x-y plot (within the program) to evaluate which cam was the best compromise between horsepower and torque. It turns out that I should have picked the MP 4452757 cam, because its horsepower and torque curves were the best for the 0-5,000 rpm range as simulated."
http://www.sweptline.com/tech/sims.html
Another EXTREMELY COOL thing about Dyno 2000 is that I can build my engines within that program and then export them to HotRod Magazine's "Championship Drag Racing: Player's Choice Edition" (which comes WITH a '69 390 AMX) and run down the qtr mile with my Dyno 2000 engine!!! I totally duplicated my own '69 BBO/AMX's performance, exact same setup, exact same ET. Of course I also went as wild as possible, getting an AMX top fuel funnycar into the 5s.
You can also blow your car sky high like I did to this flopper:
