My A36 is a 73 model and have just over 4000 hours since new. Runs like a clock.
My hangarmate has a 1978 model, recently installed the TAT turbonormalizer with Superior IO550. On one of the first test flights we went to FL170 and clocked 211 KTAS on 17 USGPH, lean of peak. Climb averaged 1000 fpm.
If you google for "C-GFLD A36" you will find a very nice sample of the breed.