David, I have no problem running my cottage Voodoo at the races: all 2017 and most of 2019. I did alright and had a great time this past Sept at Peterborough.
It still has its full interior, carpet and both bench seats, right hand drive regular rotary/push-pull steering helm. Minimum required setup for racing is that you have enough flotation fastened/secured to the boat, and that all your running gear is also secured to the boat (strap down the battery, fuel tank, paddle). Engine ignition kill switch needs to be functional. Others can confirm but I'm not sure if the throttle needs a return spring or not (can you run with just a side mount throttle?). I remove the bench seats and bolt in a light fiberglass seat for racing - that saves me 25lbs and keeps me from sliding around the bench, but I did race in early 2017 with the front bench in with just a folded up towel for a cushion.
I don't think you should really consider a T-boat a race boat only. Things that make it race-y-er like aircraft style string steering, foot throttle, center steer helm location, short shaft motor, and steering mounted trim switches all help to make the boat more enjoyable even at the late just out for a fun run. Those things give you better control and better response and feedback when dealing with boat wakes and rough water.
Progression of things you will need and should consider:
Essentials:
- enough flotation
- strap everything in to the boat, nothing loose.
- kill switch functional
best to haves:
- foot throttle
- steering mounted power trim controls
nice to have:
- center located steering helm
- short shaft motor
eventually, maybe:
- aircraft style string steering and wing plates.