I just bought a used hard top for my 1970 K5, but the guy didn't know from what year it came from. I know its for a 69-72 full top K5, but is it single or double wall?? I know that there is differant mounting involved with the two differant version of tops! How can I tell?? Will it bolt on to my 70 K5?? Where do I go from here??? The top came with no mounting hardware, so I have to find it myself. I want to be able to put the top ASAP, when I pick it up in a week! Blazin' in TEXAS!