I do not use any of the lead additives; and have never encountered problems in any of my collector vehicles.

If/when it becomes necessary to rebuild an engine (for other reasons) we have hardened seats cut in the head. Permanent fix.

Jon.


Good carburetion is fuelish hot air
The most expensive carburetor is the wrong one you attempt to modify.
If you truly believe "one size fits all," try walking a mile in your spouse's shoes!
The Carburetor Shop