Once the car is reassembled, new brighter headlights will be installed. I’ve done a bit of research into standard sealed beam lights for the TR6. While there are some very high intensity (and high dollar) systems available, there are also low cost answers too.
The original TR6 sealed beam head light bulb is #6014. It is 60W low beam and 50W high beam. Putting out 32K and 25K candlepower respectively.
A brighter halogen bulb, #H6024 can be substituted. This bulb is 65W low and 40W high with 35K and 27K candlepower respectively.