I tried removing the gear with a 2 jaw puller and couldn't budge it, it wanted to mushroom the end of the shaft. To get it off I had to use a bearing splitter like this:
http://jcsonlinetoolshed.com/product.php/10346/962//7cf918f3a1b27d5838e03ae753395062
and an arbor press. I did this on a couple of dizzys and they all came off hard.
Getting the gear back on in the right place is the trick. The hole has to be lined up just about perfect to get the pin in. When I tried to put the gear on with a socket and hammer it would rotate and the holes would not line up for the pin. It is easy to gall the shaft up by pressing the gear on and off many times trying to get the holes lines up.
Has anybody done this successfully? Did you live with the holes for the pin not lined up perfectly or is there a trick that I'm not aware of? Cardone rebuilt dizzys have another hole drilled through the gear and shaft for the pin which solves the alignment problem. Am I missing something else?