Either way, you need to get the overpriced 7" lamp adapter.
Seems to me that there's three NField Gear kits that have the adaptor included:
145017/A - Pre-assembled non-sealed halogen, 60/55W - $111
Z90477 - Not pre-assembled, sealed beam, 60/50W - $80
Z90447 - Not pre-assembled, Lucas non-sealed beam, no wattage given - $90
Gary at NField Gear suggested the first option as a popular choice, but didn't answer my questions about the differences between them or what the wattage of the Lucas is. I don't need to pay $30 more for pre-assembly - is the sealed beam light good enough?
Scott - the pre-assembled kit description says nothing about a Minda reflector - what is it?