Sean,
I don't think you have many options for the fan. The BVM jets require the Viojett fan, they're the only ones that will fit being that they are a smaller diameter than the Dynamax/Ramtech fans. You'd have to change the inlets and tailpipe ducting if you wanted to use the bigger fan.
I'm pretty sure the 2 seat was the Maverick, later the single seat I think was the Maverick pro.
That's not completely correct... The maverick has been flown with the TF-4000, Stu-Max and E-Turbax all with the stock ducts and a small adaptor...
Turbax Video
[youtube]http://www.youtube.com/watch?v=7QM9dZObHL4[/youtube]
Stu Max video
[youtube]http://www.youtube.com/watch?v=BBAEp78Ii88[/youtube]
Couldn't find a good video of kirks old maverick with the TF-4000 but it's out there