Coils on them shouldn't be jammed as i only got the shockers 6 months ago, threads didn't have rust either.. just use some wd40 and she'll be fine.
It's easy to do Vlad, just jack her up and you'll get what i mean. Your a strong boy, sure u can do it...just get some spring compressors and its easy as.
If u need any more help, give me a call.