looking 4 78 blazer full convertable kit

I,m wanting to make my blazer full convert. like 75,s but can't find a donor,is there a kit out there to do my 78

There's not a kit that I know of, but a quick search on ebay and craigslist should net you a TON of beaters from which you can get the parts you need.
I've heard that the floor structure was stronger in the older Blazers to keep everything in line when the top was off, so you may want to look into bracing your body up with a rollbar or some tie bars before you cut your roof off!
Good luck!

-Phil at FBI