Thanks for the replies, I hopped on another project but now back to this one!
This has been sort of a frankenstein bike from the beginning. I bought an 80 special frame and engine and put everything else together. The rear wheel is an 18" with a drum brake off a 77(?), front wheel is stock, both wheels are spokes, tank is off a 78(?), forks are off an '80 the rest is all custom.
So it sounds like I'm good to go on swapping the '80 triple tree/forks onto the '76. To my surprise my $400 titled parts bike actually runs, I'll find out how well this weekend. Worst case, the '80 engine mounts are the same as the '76 correct?