I'm just curious what this sled is worth, it's in fair shape, runs good has the 440 rotary valve engine with factory twin pipes, It's a quick little sled.
i would really check the belly pan area for damage, they took a beating. if compression is good, and its pretty clean I would say it's prob worth -/+ $1000
used sleds are priced quite high in Alberta. parts can be tricky to find for these...good luck.
If its a super sonic and has the 440/454 rotary valve motor in it someone put it in. The supersonic was a 340/354 the ultra sonic was the 440/454. Its probably a ultrasonic with a supersonic hood,not that it matters it's still a cool old sled. Just FYI.
If it was a 79 Supersonic it would be worth more. Those and the Blizzard 7500 were sleds way ahead of there time. Then they went to the steel tub and extra weight and not so good.