Engine analyzers are becoming more and more popular. They give you the
cylinder head temperatures and the exhaust gas temperatures for all your
cylinders.

That said, there is no real evidence they prevent engine failure or prolong
TBO, despite the many testimonials to the contrary. This is probably
especially true of a cool running engine like the carbureted O-470 in a
Skylane - there is little you can do except adjust the mixture.

I wouldn't bother with the expense. Just my opinion.

DB