Generally all the alignment bits have to be right to not have troubles. Timing chain in the right phase, cams OK, compression on #1 cylinder, Dizzy in the rings phase with the oil pump drive, dizzy center piece pointing forward. It's hard to get all these right and still have the problem I did.
But my dizzy was pretty badly worn, and I just managed to get it in wrong. I may have had one of the other items off too - this was a long time and a lot of experience ago.
But I'll never forget getting stranded like that!