I'd go 7.1 with a .990 pin...try to get that heavy Hemi piston as light as possible and the rod ratio will benefit the high piston speeds with the tall 10.72" deck.

On an RB 10.72 deck wedge it's not as critical and a 6.7-6.86 rod is fine , on a hemi go for the longer rod


WIZE

World's Quickest Diahatsu Rocky (??) 414" Stroker Small block Mopar Powered. 10.84 @ 123...and gettin' quicker!

https://www.youtube.com/watch?v=-mWzLma3YGI

In Car:

https://www.youtube.com/watch?v=PjXcf95e6v0