Motor plate for hemi demon

My trans guy Tom called me last night and asked me to make a template of my motor plate,but my junk is a b-body.Could someone provide the dimentions from the top corner of the stock chassis rail where the inner fender meets to the other side please?Also anybody else using a motor plate,,,,,,,post up some pic's so we can get some more ideas.Tom will be installing a NON blown all aluminum Indy 500+ inch in the Demon.

Thanks fellas,be back later.