Ghenry I will keep you in mind. Right now they are the only set of heads I have. I was not sure if the 76 heads would create too high of compression for the 80 motor or if I would need to go to a fuel octane higher than 91. My sleds are usually ridden at a 6000 feet elevation.
If you're not racing it you're better off with the stock 1980 parts. The sled will be worth more with the correct stuff and the performance increase won't be enough to warrant the extra headaches.
I'd sell the heads and anything else worth $ to help pay for the correct stuff.
Truth is I would probably look for a nice Vmax 600 to buy as a donor and install it's powerplant if I wanted to ride it at all. Cheaper, faster and more reliable. As long as you don't butcher the sled to install it you won't hurt the value.
opsled