well stumpy, it looks like the old saying : "there's no such thing as a 15 minute job".
a little more complicated for sure.
my old man had a quad bypass when he was in his early 70's, and a carotid artery clean out around 80. it kicked him sure, but he had an "i don't give a sh!t" attitude, and that helped him tremendously.
here's hoping the best for ya buddy ! you will do good !