Well we use copper washers to index the plugs... I guess you could do the same with the 1/4-32 plugs to get the angle on the hi tension lead... the rinfire VR2L spark plugs are long reach with a longer threaded section... Could also come up with a spark plug enclose the same diameter as the hex base, thin wall tubing with a thread on hi tension lead... you position the lead and then tighten the threaded cap nut.. kinda mimics the aviation plug... the only issue it needs to be small, and compact, otherwise its going to look ugly, like a broom stick hanging off the engine.