greenlane

Hi i've bought a 1968 BSA Starfie with 21" front wheel Standard forks new rear shocks and wish to use it on greenlanes. It will be MOTed and i will need to run lights so i'm looking for advice on what to buy alter and bin. I've been told a PVL ignition is too die for but not suitable for running lights, thinking of boyer branson type ignition with a gel battery does anyone have any advice? Also foot pegs, gear change, rear brake folding welding to the frame placement sump guard etc. Which carb and moving the inlet manifold back? I don't want to waste time and money but i would like to get it right. I would be greatful for any advice given thank you Peter