B/RB Chrysler Valley Pan Bolt Pattern Dimensions

[GTX JOHN]

Approximately one inch difference as I remember.
10 1/4 C/L of intake bolt holes on Low Deck and
11 1/4 on High Deck in overall width on undecked
blocks.
Is that the dimension you need.........Monday I could jig
some up and give you any other Dimensions you need.
Rods are .4 to .5 longer depending on engine High Block
The valley pan hold down bolts are in the exact same place
but the straps are wider past the holes on the high block.