From Honda-tech
Quote Originally Posted by HONDA-TECH.COM
The tranny, the aluminum housing that contains the gears/shifter forks/synchros etc. will bolt up to any H22 block, but the SH tranny has an ATTS unit instead of an intermediate shaft driving the driver's side wheel. The big difference is where the mounting points for the intermediate shaft (base) and the ATTS unit (SH) bolt onto the backside of the block. this has been covered SOOO many times...

I have fabricated a bracket that replaces the ATTS unit with the intermediate shaft. What do you want to know? The bolt pattern is not square at all it is at all sorts of different depths and heights and other issues. I had to create a cardboard template, transfer that to mild steel, then see if it fit, make adjustments, then made a final copy. It is a true custom fabrication job, it is a PITA. If you have a base tranny and an SH block then you just bolt them together and start measuring where the Intermediate shaft sits and fabricate.