Slant 6 lean burn distributor info...

easiest thing i can think of is to run the MSD lead (green i think) to both pickups... now between the pickups and the (purple??) lead run a two pole switch so you can just complete the circuit between either pickups at will...

now if you really wanted to get tricky you could figure out a way to have a pressure switch or something hooked up to relays instead of a switch...

it would automatically switch between pickups depending on boost levels...

all this being based on the idea you can have either a switch controlled by a adjustable pressure switch or MAP sensor lol...

Ya dig?