RE: lanier p51 SSC
I doubt you'd be able to convert it to either 2610 or 2548 scale class. I haven't seen the plane, but if it's like other SSC warbirds, you'll basically be doing a scratch build using the kit as a source of raw material. And material that's already cut to the wrong shape.
If you want a scale class plane, buy a scale class kit, or knock one out yourself, it's really not hard. Heck, check with Chris, he probibly still has some 2610 planes gathering dust.
Which class are you more interested in 2610, or 2548? We might fly some 2548 up here later in the year if there is enough interest.