Sarge is correct: patience is your friend, so is a good penetrating oil! I used PB blaster when I first got the Vette and picked up Kroil recently. Both work extremely well.
Take lots of pictures. I was lucky enough to not need a reciprocating saw or torch. I snapped 1 bolt but that was attaching the alternator to the bracket, PO had stripped it.
When I replaced the suspension I got everything from Vette brakes and products out of Florida. That included the DVD video instructions. It was awesome. I had never attempted a project like that and they made it extremely easy. I was like a little kid, watch 10 minutes, run outside and work on the car. Back inside to watch for ten minutes then back outside to work on the car. They did/do sell the DVD separately if you need it. Not sure how different the 75 is from the 81 but if it helps I still have the DVD and can send it to you...but only of you promise to come to the gathering
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Dave C..........My mantra: I can not be bought!! Long and short term leases available.
In the words of Zora Arkus-Duntov "Is your seat belt fastened? Alright, Let's go"
Yeah, I know, Shut up Dave.