I used these bulbs:
https://auxito.com/products/h4-9003...orward-lighting-bulbs-12-000lm-52w-bulbs

The bulbs will fit headlight shells designed for H4 halogen bulbs such as Hella, Bosch, Cibie, etc. If you already have a set of headlight shells designed for H4 bulbs, you can use them.

I didn't have any shells lying around, so I bought these:
https://www.amazon.com/IPCW-CWC-700...EPEU/ref=cm_cr_arp_d_product_top?ie=UTF8

The locator tabs on the cheap headlight shells are flimsy and didn't fit the buckets on the truck exactly. A couple of minutes work with tin snips and pliers made them fit.

BTW. The bulbs are only 26 Watts each. No need for relays.

Last edited by Gord&Fran; 11/07/2021 3:20 AM. Reason: add'l info

Gord 🇨🇦
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1954 1/2 ton 235 4 speed