Hey David, welcome. I'm new here too, it's nice to have another newbie around. I have the same exact seat on my '77, it's as ugly as sin but I have to admit it's pretty comfy. I will, however, be looking for an original style seat to replace mine as soon as I get it running. I was going to chop my '77 as well, but couldn't bring myself to cut on it so I bought an old amen savior frame. After having it for about 6 months and slowly tearing down the '77, I decided to just clean up the old girl and find a donor engine somewhere to put in the chop frame. So I'm slowly stopping the cancer on the frame (mainly light surface rust) and cleaning it and putting back together. I'll get it running good again and street legal, then in a few years (if it makes it that long) I'll break down the engine and do a rebuild. She has 31K miles on the odo. I don't have a lot of time to work on the bike, so it's going to take a while, but good things come to those who wait. Good luck on your project.
tom