The chassis was a 1981 SRX (that I did know) - a primative attempt at an old school mountain sled with (apparently) a Rupp motor. I could have got it for $75 with dirty carbs, but it is gone now. Maybe next time.
These guys are right. I put this thing together probably 10 years ago and never really finished it. It's an 81 SRX with an ipaco tunnel, 136 inch cat skid, and a 77 Rupp motor.... I think I sold it to one of my daughters friends for $75