Then build the whole seat assembly on a 1-1/2inch block higher up so you can see over the IP just fine. Its YOUR airplane, and simple quick fiberglass work... Customize it!!!
Marc, without calling out names, several have in the past claimed to have achieved some degree of nirvana of the mile high variety. Perhaps double jointed, perhaps hobbit sized persons, I dunno.
Heck, Jerry Schneider got out of his seatbelt flipped over and mooned cheeks skyward at that commercial airliner...and he's a good sized guy. So the mechanics I leave up to the couples creativity. But the seat belt remark has been made in the past.
Me, I am going to be doin' good just concentrating on flying the darn airplane, let alone contemplating such shenanigans. But other more accomplished pilots...YMMV.
Please, no Billy Barty jokes...restrain yourself.