Okay, nobody's jumped on this one -- so even though I'm one of THOSE -- a bike guy -- I'll give it a shot.
Get in touch with the ECTA, find out about the 1-2 April Hot Rod magazine event at Maxton, and get your nappy butt up to see that event -- whether or not you plan to compete. I don't know the convertible car rules -- don't know how fast you'll be allowed to run without a roll bar and other safety stuff -- but I know that Maxton's not all that long a ride for you, that there's be a zillion or so kindred spirits there for you to pester with questions, and eye candy that'll get you hooked on LSR even more.
Also consider the USFRA -- there's the "130 Club" where I think you'll be allowed to run your convertible on the Salt without a rollbar (but please check before you drive out to Wendover if that's the only reason you go out there). Joining the SCTA-BNI will get you that rulebook, which is the same that the USFRA uses (join that group, too -- they all ask a pretty reasonable membership fee, need the support of all of us, and give nice membership cards for your wallet. Be forewarned that one visit to the Salt will mean that you forsake foreverany hope of having excess disposable income -- it's addicting!
There's a link to ECTA on the home page of landracing.com, and links to SCTA/BNI and USFRA, too. Join up, get your rule book(s), start asking questions, learn to put up with racer-talk, and get back to us with questions.
Got it? We look forward to seeing you soon.