First time swapping edelbrock aluminum for 915 cast iron heads.

Yes we have unleaded 95RON and Super 98RON, we also have BP ultimate/V-power and others which are 99>100RON I believe. Not too up on fuel tech tbh so cannot answer your question with any authority, I just put SU in my Focus and thats it these days.

Its still winter here and most of the guys here are busy with there projects getting ready for the season opener on 30th March "Festival of Power" at SPR. I haven't been involved in racing a car for over 20yrs now and just attend to watch and chat with people I knew who are still running today as well as the new guys. Still have an interest and learnt a lot over the past 4yrs since I got back into a bit from here and Moparts, but tbh it ain't the same as it was back then, we had to work and think to make HP from factory stuff, now you just pick the phone up and order your 800+hp motor and go quick, or in some cases not.

The issue with some UK-ers as you put it is most won't ask the people they should be asking, and that doesn't mean me, I'm no-one special, they just seem to make wrong decisions or talk to the wrong people, I don't know, perhaps its the internet and just looking a the glossy ads, or the English trait....reserved, ....to me, if you wanna learn you go speak to someone thats doing it or has done it and ask just like I did when I started, but back then people talked more. One thing I will never forget though was back in 1985 when a Funny car driver came over to me and asked what I've got inside my 340 after firing it up to get it off the trailer, they just didn't do things like that to us sportsman guys...anyway enough waffling from me.