How much HP would you guess my 340 produces?

All I know is almost all folks I've met at car shows (and even here) with street cars that brag about a big hp number have cars that do not run the mph at the track that the dyno hp number would predict. At that point, the "HP" number is just a pathetic machismo thing.

If you never plan to take it to the track, don't worry about how much hp it makes - just enjoy the hell out of it.