Advice on use of leaded fuel vs high octane.

[dsmtuned]

There are some intelligent folks on this forum, so I thought I would ask this question here.

I just bought a 1955 Oldsmoblie Starfire 98. This car's engine was designed to run on Leaded Fuel.

My question is: Do you guys think that the engine will be damaged by running 91 octane unleaded fuel?

Should I use lead substitute?

Maybe I just need to add WI to it...


Thanks for any advice and/or knowledge.

-Craig