I have not done the retrofit yet, but I did get the Hylux/morimoto standard kit in from FastHeadlights.
I really like the setup of the Hylux ballast. It's a little bulky but it has good wire lengths and is very easily mountable vs the morimoto. I really like that in the event of a part failure, troubleshooting is very easy instead of swapping part after part side to side. Well constructed and simple.
The Morimoto bulbs though, Jesus. Keep reading, this is important.
The bulbs fit well. The lengths were acceptable. The connectors though are another story. One side clipped right in, one side I had to depin and pull the terminal seals back, reseat them into the connector, make the connection then force the seals back in. One side had incorrect polarity, so I had to switch the pins On my original Morimoto bulbs, one was correct, one was not as well.
In closing, very happy with the Hylux setup but I will avidly do what I can to no longer have Morimoto products in this truck or any other vehicle I work on. You're paying extra for nice packaging and that's literally it.
I hope this is insightful!