Hey Bob,
If you don't mind me asking, where in Michigan do you live?
I'm on the west coast, actually Fennville, a little south of Holland. I race Tunnels also and just got back from the Kenoska race. Great time and the people are outstanding. One thing about this hobby, everyone wants to help out. A very friendly atmosphere and a lot of fun.
As Mark stated, the Kalamazoo fun run is there for all to enjoy. Its a little get together to run boats for fun. Although it's not really a race, it's an opportunity for your son to run with other people without the pressure of actual competition. I'll be there also.
As far as the Lap cat 2, there are quite a few boats out there that will work better than the old Prather Lap Cats. But I guess it all depends on how much interest there is to race,what level of competition you'd like to participate in,or your son and what your budget is. The one thing that's for sure is, fun can be had on all levels no matter what make the package is. As you know, the setup is very important with prop selection.
For 7.5 boats, I presently have an HTB, Woodstuff. Leecraft and a Prather Lap Cat 2.I can honestly say, I'll never run the Lap Cat again, Your 1st choice for a 7.5 boat of an HTB is a much better choice. For a stock 7.5,as James said, the 340 would be the one to run. Also, a leecraft, and Shaman (very hard to find) could also be good pics. If you would like a wood Tunnel, Mike Crawford, Woodstuff Boats builds a really nice and competitive boat. All jig built, and the quality is second to none. Mike has built a couple of boats for me recently including a 48" gas outboard tunnel.
Here's a few pics in my gallery of my Woodstuffs.
https://www.intlwaters.com/gallery/displayimage...m=777&pos=5
https://www.intlwaters.com/gallery/displayimage...m=816&pos=7
If I can help in any way, please look me up.
And WELCOME!