I haven't used the correct tool from GM classics but with my 63 I've removed both front springs 3 times in the past couple of months for different reasons.
I used the loaner tool spring compressor tool from my local autoparts store each time.
The first time was a steep learning curve. Lots of trial / error & seemed to take forever because I was only using the hand tools that I had at the time.
When I realized that I needed to remove the springs again, I took the time to remove the metal covers inside the wheel well that covers the majority of the springs. That & investing in a compressor & impact wrench made the whole process a lot easier & faster.
Removing the metal covers inside the wheel well gives you a lot more access to the springs. Using a compressor & impact wrench allows you compress & remove the springs quickly & with relative ease & the same when reinstalling them.
There should be 6 bolts holding the spring covers to the inside fender well. 1/2" bolt heads.
Robert