In need of some 273 head education

I have removed the cam and when I go back in with the new one I will make sure everything is right. I did a cam change years ago and didn't degree the cam which I thought might been a bad idea latter on. But I matched the dots on the cam gear and the crank gear 6 o'clock and 12 o'clock and the car ran fine. So I will try that again this time with a new timing gear set. I will get a true roller this time and maybe all will be well. I've done this type of thing before but I'm a A1 certified mechanic. LOL.