Ok, I have an engine that hasn't been started in a long time and I'm not sure if the Dizzy has been messed with. Its a Chevy 350SB. I've read on here about the piston stop method of cranking one way, then the other and TDC should be between those two marks. BUT, how do you know what stroke youre on? Compression or exhaust? Don't I wanna set the dizzy so that the rotor is just before #1 cylinder when #1 cylinder is on exactly TDC of the compression stroke?