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..

[brant]

The lubrication of lead is real
Some motors had to upgrade the valve seats back in the day
BMW motorcycles for example switched to hardened valve seats around 1970.

It was real

Not an issue in a 914 motor
But did cause seat problems on some brands in the day

[wonkipop]

The lubrication of lead is real
Some motors had to upgrade the valve seats back in the day
BMW motorcycles for example switched to hardened valve seats around 1970.

It was real

Not an issue in a 914 motor
But did cause seat problems on some brands in the day

good info.
that explains people putting the additives into 60s and 70s aussie made cars.
falcons and holdens etc.