Super Thick Siamese cast Cylinder Walls

O.D. of cylinder wall is squared off for increased strength.

Outside of block looks likes an original 1965 427  FE Side Oiler, with screw in freeze plugs. Vintage serial number and 1965 casting date are located in the original positions.

Oiling system identical to 1968 427  FE Side Oiler.

Material: Iron blocks are a very high quality grade iron with high nickel content.

Pattern work, foundry work and all machine work done in the USA.

Reinforced areas include: main webbing, main housing area, oil pan rail,
cam support and crankshaft skirt.

Water transfer passage from block to head has been reduced to prevent upper four corners from cracking, (a problem area for all original FE blocks).

Deck surface thickness increased 3/8” (over stock) for added strength.

Water jacket passage is cast shallower to increase bottom end strength.

Main caps are stronger than originals.

Cross bolt diameter increased from 3/8” to 7/16”.

The iron block bore range is from 4.130” to 4.440”.  Standard bore is .010” under 4.250”, leaving an average cylinder wall thickness of .260”.  This bore size (std. BBC) allows a wide range of pistons and rings.
 

The iron block weighs 230 lbs., which is 30 lbs. over stock, due the the reinforcements listed above.  It is 110 lbs. lighter than the stock Ford 460 c.i. block.