Twister fuel opinions.

[helipilot]

Hi...new to your site and happy to have found it. I recently acquired a very nice stock '75 440 S/T. I was was wondering if anyone has any recommendations for gas and oil types. If I remember correctly, back in the day we used 100/130 avgas and Klotz at 25:1. Has anyone had any experience with current 100LL (low lead) avgas and a modern synthetic and at what ratio? ...or is it better to stay with premium car gas. I wouldn't want to blow it up just yet. Thanks for your input. Gord