I have been running a crank trigger ignition in my 545 and it works fine. Here's my question I recently lost a roller lifter and it damaged a cam lobe. To get this car on the road for the rest of the season I am putting in a hydraulic flat tappet cam that I have laying around. So rather than take the bronze dist drive gear off my dist I just grabbed an old but real good dist out of my stash. I took the points and everything else out of the dist as the other one wasn't hooked up to anything anyway. I am assuming that this will work. What does the dist do anyway as it is hard for me to understand this. Yes I am going to change the valve spring too. The rason for the cam change is that this winter (Mn guy) I am planning on stepping up this thing a little bit with a new cam and lifters and maybe even some more head work. The SCJ aluminum heads only have a pocket port for now and I am aiming for a 10 flat on pump gas for next year. One more thing what compression do you think this will tolerate for 92 pump gas with a fairly radical cam for next year. It is now 10.2 to1 with diamond dished pistons.