i hang out with alot of old school guys that have been drag racing since the 50`s and they all say to me that the best way to ensure a great spark with a stock ignition set up is to put the spark plugs in with the heads offs. you tourqe them down till they are facing the exuast valve. suposedly this gives your spark breathing room as the intake valve is still atempting to seat itself as the plug is fired. i have tried this when doing head gasket changes and did notice alittle more pull on the top end. it wont be a throw your head back kind of power. but it will ensure that the motor is giving you all the power you can get out of it while still using the stock ignition. i am sure that if you throw in an cd ignition it will work even better.