Finding info on Rowdy Manufacturing was a difficult chore for me too. I bought one in 2011. But I learned a few things...
They were originally based in Anaheim, Ca until moving to Oregon and changed their name to Glide Boat Works. It was founded by a guy named Richard 'Rowdy' Smith who I believe is now deceased and the company disbanded.
Mine has the AMC 360 Panther combo and I got some info on the build quality from a guy named Steve who operated Panther Jets for many years. They are hand laid boats of good quality. I pretty much did a full restoration and saw first hand how solid they are.
They handle very well, like a 17 foot jet ski. Not the kind of boat that will ever be a speed demon but very fun to drive. We prefer jumping wakeboard boat wakes anyway... These little Sandollars like to be airborn.
I did not know Rowdy built any boats with an Olds or a Jacuzzi, but I don't see why not. I do know they were generally Panther Jet units. Every one I have seen (which is only 5-6) has a panther except yours. But there is nothing wrong with that 350 Olds. A guy I see at the lake has a 68 Apollo Craft (another rare boat) with a 350 olds and it runs very well. No oil issues like the 455 Olds.
If you have any other questions let me know... be happy to help.
