Whelp.
SSD is installed and up and running.
Tried using SuperDuper to clone the old HD to the SSD and it didn't work , not even the trial would help unless I paid for a registration fee.
Went with Carbon Copy Clone (free) and it worked like a charm , got it from Bombich dot com (LOL).
It mirrored the old drive with all updates etc , just had to crack the machine open and use the adapter that came with the kit.
Everything fit well and it took about an hour to do the job.
The good is that this old machine is MUCH faster , I suspect the old HD was on its way out.
The not so good is the internet game I mess with is about 25% faster , but I'll live with it.
The bad is I picked up a PNY 500GB SSD to use as an external drive and I couldn't get it to work (the patch cable that came with it helped with the cloning process though).
It's going back to Walmart for a refund.
All in all , I now have $145 tied up in this iMac.
Fucking thing is huge compared to the laptop I've been using.
Thanks for all the advice !