[Mr70]

I've had some experience doing it myself.Much easier with a helper as Ken said.
I just ended up going to Action Glass a few years ago,and even they were hestitant with any vintage vehicles glass removal,as the prices for the OEM stuff soared.
They refused to gaurantee NOT breaking the glass,and made me sign a paper stating I wouldn't hold them liable.
I did learn to hate that stubborn factory butyl tape,and to also make sure you disconnect the embedded antenna wire at the center base & tape it out of harms way beforehand,if so equipped.
I've heard of guys losing finger tips trying doing this procedure...Be careful.