I'm in Fredericton New Brunswick and have owned my 75 for not quite a year. It's a good looking vette, not show quality but I got a lot of comments and looks last summer. Just waiting for spring with a long list of improvements and things i'd like to do with it.
Stick with original rubber, stay clear of poly. With the nut off, the assembly can be raised with a floor jack, and a pry bar can get it out. Took me about 45 minutes to an hour to replace. My exhaust didn't have to be removed.
I just installed a polly bushing in mine... will keep a record to see how long it lasts.. should have at least 3 drag race days as well as normal driving for summer.