[Excaliber]

The Arias pistons will only work if the compression hieght of the piston (position of the wrist pin) will place the piston at or near zero deck hieght with the block at TDC.

The 427's were originally specd -.035, that pretty deep in the block, relatively speaking.

I have to order new pistons for my ribbed 427 block because the block HAS been decked to a non standard number.