Just purchased a 1975 MGB what fuel do I use. I read in the manual that it is set up for Regular Fuel and not unleaded. Please Help

Thanks

Unless it has had hardened inserts fitted to the exhaust seats, you will need to use leaded fuel, or unleaded fuel with a lead replacement additive. A product called 'Valvemaster' is one of these.

Beware of magical devices that make all sorts of extravagant claims to use with unleaded fuel, that increase power, provide greater economy, used on WW2 Hurricanes in Russia etc.