well i can tell you i spent countless hours, trips to shops and lost about all my hair trying to figure out how to make these work. I was ready to place orders for custom made o-rings etc, until i got ahold of this guy- Michael Bacon from precision.
His number is 219-996-7832
I don't remember if he will remember me by name, but you can tell him your situation, say you've got a set of 525cc domestic injectors that you need to get the mitsu type (pentle tip) put on.
If you need any other information, any of the measurements on any of the holes and what not, let me know. I can't say for sure that our injectors are identical, so you may still want to get out a micrometer and start comparing yours and the stock ones. Lastly, even with this modification, you will still need to shim the fuel rail, just a couple of washers will do the trick.
Good luck, and let me know if you need anything else.