Welcome! Very cool build! Looking forward to more details & pics of the setup.
Much interesting work going on there - I'll probably think of more questions reviewing your pics - a few quick ones -
Did you simply box the original suspension crossmember here - or rework it entirely? If so, what did you do to maintain suspension geometry?
Since you built your own engine subframe/cradle, how are you connecting to stock subframe points? Same as the MWB setup?
How did you determine engine/transaxle height for correct axle/CV travel & alignment? Trial & error or...?
Did you open up the ports on the shorty header? The one I have on hand shows a significant flow impediment in the flange design, even though the runners are slightly larger than stock.
I like your reverse shift gate setup, seems cleaner than running cables under & back, how did you ascertain geometry of the gate transfer mechanism?
Also interested to see your take on the t/stat side coolant line adaptions.
Are you going to use Hondata, K-Tuned or K-Tuner adapted EMS? Or something else?