Have it on my beast. No complaints. The major thing is that all your vacuum lines are in good order and you have no leaks.
You might like to have a read of this from a post in 2006
CLICK MEExtract:-
Corvette "Cruise Master" Cruise Control Diagnostics
"The Cruise on my 80 never worked from the day I bought it. It turned out that the transducer was the culprit. It was a totally lost cause, since the insides had just chewed themselves to bits and been removed by the previous owner. I know these can be bought "reconditioned" from the US, but being in the UK,
I decided to track down............."[/i]