Tony!!! I started my airline career on the 188C Electra and flew on them for about 6 years. Other than an extremely complex aircraft systemwise, the old “Paddle Steamer” was a joy. When we converted on to the DC8 we thought “How crude”. The DC10 was even simpler and when the 747 came along we were back in the steam age, but that was why they were so good. KISS.
Here in NZ we only have 100/130 octane but I run the Gipsys and a Continental C65 on that and they don’t seem to mind