The obvious ...i never fixed the 77 ignition switches in the system and the loss of spark after running awhile and then complete failure to run... in the run position button out .....putting in the dyna ...putting in the relay ....bypassing ballist with straight wiring 12 volt ....triggering the relay past the kill switch .....allowed proper triggering to relay for everything to work good ....its obvious to me that a dyna hooked up without a relay is a downgrade and still loses lot of fire through switches ....this setup on the 77 is rather top knotch as an oldwing with wasted spark system can get ....dyna ignition and coils is money well spent and a matched set of parts ...no ballist ...and absolutly no concern either about over heating dyna unit with dyna coils ...about as good as it gets for an oldwing...moneywise and biggest boost .....ive got one more relay im going to hook it up to the angry dresser ...im going to go over the ignition ...and see if it comes close to the 77 setup ....im hoping it dose ....but if not ....i want to figure out how to put a dyna in a 1100 .....problem is dyna works at cam speed and 1100s work at crank speed ......it would be great to be able to install dyn ignition and coils to a 1100 ......execution time is what's in play here and of course hotter spark ...this is why the 77 1200 runs so snappy on the throttle ....its not about hp its about getting it done and that makes big HP and torque.