I purchased a 462 reciently with virgin bores. It appears it will only have to go over about .010 or .020 to clean it up! When we picked up the motor, the guy had 430 heads from a '63, and gave us a story that that was the hot ticket back in the sixties with the drag racers.

I'm looking to hear from anyone who's heard this, and what the reasons and benifits would be. I spoke to my engine builder, and he said he remembers building a couple of engines like that back in the mid to late sixties for a local racer, but doesn't remember why the 430 heads were used.

Any ideas???

LINC-MERC went to a 2V carb in 1960 and redesigned head changes (smaller/lowered runners) in the 1961 LINC engine redesign (to have the carburetor fit under the new LINC lowered hood design). This severly hurt flow over the previous 58/59 cylinder heads. In 1963, LINC had another engine redesign in where they returned to a 4V and improved cylinder head flow for the application. The design was still hampered in that it still had lowered runners and lowered intake carb plenum to fit under the lowered hood.

I will try to make available some tech material on the 1963 upgrade. It also consisted of a piston dome design change.

If you want a free flowing HI-RPM engine, my suggestion is the 58/59 heads and matching intake.

Also remember to take into consideration the 462 bell mounting pattern;

http://www.thelincolnforum.net/phpbb/viewtopic.php?t=16763

This engine series is becoming more complicated than the FE.

The 58 to 60 heads are the best. Largest ports and valves and highest compression. I have an extra set if anyone is interested.

As head gasket surface and combustion chamber roof are one continous flat surface.