I was about to go and cross-reference part numbers at
Majestic Honda - The Internet's #1 Honda Automotive Parts Store to check compatibility, but you can do that too.
As far as the proportioning valve, every single 4040 valve I picked up had issues- I ended up using my stock prop valve and everything was ok- even after I upgraded to 11 inchers all around. It may not have been ideal, but I never had stability issues while braking through a turn. If you measure pad and disc temps though, it might be a different issue.