Forgot about the spring, must be a chevy, they make a compressor for
this job but you can accomplish compressing the spring another way. Put
it in a vise, squeeze it together & strap it down with 3 or 4 zip ties,
put it in place & cut the ties. A little tricky but can be done with a
little finesse. I wouldn't onbolt any hinges, you shouldn't have to &
your alignment won't be disturbed.