Hi Dennis,
Again, welcome to the club! IMHO, the early "straight-tail, fastback" 150s make a lot of good sense. I've really enjoyed our 1963 150-C. You'll soon discover that being a vintage plane, it has quite a bit of ramp appeal.
Also, keep in mind that these early 150s are excellent candidates for conversion to taildragger or "conventional" configuration. The bulkheads forward of the seats actually are pre-drilled for gear fittings that were used in the earlier Cessna 140s. I've now gathered most of the parts necessary, and am hoping to complete the conversion, utilizing the STC by David Lowe. sometime this year.
Concerning your question about the fourth, older cylinder -- I wouldn't put much stock in what the doctor is telling you. Find a good mechanic who knows 150s for a proper diagnosis.
Again, welcome to the club ... I'm sure you'll find this forum very informative, as well as entertaining at times ...
