Hmmm... if you converted a 156, isn't it going to look like a Saab 93 convertible? I mean, not as bad as that sure, but I do think convertibles should be 2 seaters to keep the proportions sporty.
No idea how you would do it. You'd definitely have floppiness problems
Isn't there a Top Gear episode where they did this with a people carrier? If I remember rightly, it ended up on fire in a car wash
