Originally Posted by Jim@BAWS
Very nice indeed...More than likely it is the 390 HP HO. I had a 1991 not to long ago with a 454 HO. I drove it at show ski nationals as a needed something with a ton of power. Pulling 7 guys on jumpers I needed that much power. You will love the hole shot.
All the best
The owners manual that came with it has numbers of 390/425 for the regular and HO. Seems a bit high to me but either way its plenty.