You might consider reposting on the Cherubini Hunter forum as some owners may not visit this section.
I own a '79 H 30 and have considered the same question as a matter of routine maintenence and found in the archives several threads that outline the potential problems. IIRC, they should be torqued on the hard. I don't remember the numbers, but you may in fact find the specs in one of those posts.
How long have you had your '77?