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Matt, Engineer
Category: Car
Satisfied Customers: 21613
Experience:  Honors degree in Mechanical Engineering, worked 8 years as a Formula 1 engine engineer.
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What modification would be needed to enable an 1958 Alfa Romeo

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What modification would be needed to enable an 1958 Alfa Romeo engine to run on Unleaded fuel?

if the cylinder head is aluminium then chances are it will only need the ignition timing pulled back 1-2° as the valve seat inserts are hard enough for this fuel

even if its a cast iron head engine I'd say just retard the ignition as will be very hard from years of use in any case and if you start to get issues ( tappet clearances closing up) then you'll have to machine the head to fit inserts in any case
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Customer: replied 4 years ago.

Thanks Matt!

glad to help