Desk top dyno?

The actual Computer Program you are referring to is: Desktop Dyno 2000.

It came out in 1999/2000, you can really have some fun on there.
That program is what opened my eyes to engine combos...and the possibilities of the Lowly 318.

I bought the program as a gift to a friend of mine and we played with it all the time.

I once built a 4500hp Blown Hemi...it was awesome!!! the dyno graph looked like the backside of Mt. Everest...STRAIGHT UP from 0-8000rpm. 8)

Its kinda pricey...like $50-100 new...but you can find it online for cheaper...whether its better than the actual program..I dont know.