Building a new 505 With Callies / Mopar Performance Block

Bobzilla said
I use the Diamond Racing Pistons calculator because it’s quick and simple. Shows 11.78 to 1 compression ratio, so you are probably right on your numbers.
Do you know how far down is the 1st ring from the piston crown? Only makes a tiny difference but I could not find it listed for the Icon pistons so I guessed .310” which may be off a little.
Did you verify the piston volume? At 4.5cc the notches must not be really deep.

Damn I forgot to about that calculation. I must be going brain dead Icon catalog told me .260 that is what I used for calculations this time and came up with 11.81-1.
Hopefully I have the valve to piston clearance to mill the head. Find out next week. Notches are not very deep.
Thanks for the double check everyone.