That is a smoking deal on those capsules at BD, you will need to order 2 6 volt bulbs too. Add a couple of
relays and you will have a great kit for very bright lights.
On all the H4 conversions I have done I make sure there are good dedicated grounds for each headlight.
I received a pair yesterday, They are Bosch but they are marked "motorcycle". This most likely does not matter in most states, but be aware of this,
Oh yes, the lenses are made for right-side of the road driving.
I'll report on the installation (and the comparative brightness relative to an H6006 bulb) sometime this summer.
My 1954s have good grounds but I will double-check them.
It will be interesting to see the Ammeter reading at idle when the lights are on (even on low - high-beam will be more interesting).