Ralph,
I just picked up this boat the weekend before Memorial Day. Did some quick repairs and took it to Parker. So far I've got 51.6mph on the GPS but I've found several things that will help. It does have a ride plate that I have been told is set way to far down. I have since brought it up to be level with the bottom of the hull. It has a pair of holley 600cfm vacuum secondary carbs with the secondaries made mechanical (screw in linkage). From the plug readings I got it is runnig rich. Timing is at 30 @ 3000rpm. I'm going to rebuild the carbs and put them back to the vacuum secondaries (which should help), and play with timing a little. I'll be back at the river the weekend before the 4th of July.
I love the interior on yours, it really looks great in the pictures.
Thanks, Keith