Leaded or unleaded - That's the question, Need advice on which type of fuel to use.. Options

[reineg]

Hi there, Laymen and Experts alike!

I have recently acquired a 914/4-70 with a newly built engine. Up to 2.2litre and some extra horses to boot. But now to the question:
The car has got new cylinders and pistons from Pelican Parts, but I do not know much more about the engine. So do you guys (and gals) reckon it would be safer to use modern fuel and add lead, or shall I just go for modern fuel and not add lead?

What is most detrimental to the engine; to add lead to an engine that doesn't need it, or not to add lead to an engine that requires it?

Appreciate any and all thoughts on this..

[technicalninja]

Is leaded gas or real lead additives available in Sweden for road use?

I thought it was illegal everywhere for use in road vehicles...

Here in the USA if you want real leaded gas, you either have to by AV gas or specific race only fuel.

[reineg]

Is leaded gas or real lead additives available in Sweden for road use?

I thought it was illegal everywhere for use in road vehicles...

Here in the USA if you want real leaded gas, you either have to by AV gas or specific race only fuel.

You won't find leaded fuel, but can buy lead additives in small bottles at the petrol station. The bigger stations at least, since petrol stations nowadays are more convenient stores/restaurants than a place to find car related things.