Some Can-Am pics from my photobucket:
They obviously had custom pistons and rods.
I dont know how to identify the crank as 3.5-based. I have a 3.5 sitting in the dirt in my backyard but i am lazy about it. It was supposed to get mocked up in the old dynasty engine bay before i scrapped it but i got impatient.
They definitely did something here but it's still pretty far from the stock gasket marks at the entry.
I dont think they did anything here.
Those dont look like stock 3.3 valvesprings.. all i had to do was look. lol
This looks stock to me.
So, my educated guess is that all the 3.3/3.8 valvetrain needs for 7000 rpm is valvesprings, maybe.