Hi all, been having problems with setting up the timing on 1975,m 1800, type2. I have fitted a pertronix igniter. which I have tested and it seems to work as it should. Only thing that I can see that might be wrong initially is that at top dead centre the position of the rotor arm is about 90degrees out to the mark on the distributor and I can't turn the distributor far enough to line it up as the vacuum unit hits the tin ware. Could this be the reason I can't get timing set right? Any suggestions on what I should try next. Many thanks,Alan.