8ba oversized cam bearings... .080

[JSeery]

I worked in a foundry when I was young and all of our cores were sand cores. They are made from a mixture of fine sand and oil, pressed into shape and heated to form a strong but brittle structure that is easy to break after the casting. There is a wax core that is used in something called the lost wax method, but it is fairly rare. I know about it because a collage professor was researching the wax method to try to reconstruct how it was done.

 

[Pete]

The core Pete is refering to is the cam core. The blocks were made up of a lot of different wax cores all wired in place inside the mold. Shift can happen with several of the cores.

Nope, referring to block core.

There was no wax involved in the Ford block casting process.

 

[rotorwrench]

Brain fart
I used the term wax when I should have used the term resin. The casting sand is compacted with a waxy type of resin or oil to hold the sand together. Working with casting sand is a lot like working with clay. The cores for the camshaft area could be considered the crankcase cores but there are two other cores related to them. One is the front & timing chest core and the other is the rear clutch housing & oil pump drive core. Any one of which can be mis- aligned to a certain degree.

The deck & cylinder cores and the water jacket cores are the ones that affect the cylinder wall thicknesses. There were a whole bunch of cores that had to be installed & wired together in the box.