In 1970 cruise control was either ordered from the factory or dealer installed as a kit. You might get your local dealer to run a search on his dealer parts locater for the kit. Some of the old small town dealers didn't throw anything away. The servo was used for many years and the switch was also. As for cables you can make cables for the length you need with a universal speedometer cable. The hard part is the wiring and wiring connectors (if you can't find a kit). You can still get a stop lamp switch for cruise control from our local part supplier. The clutch switch and bracket may be a problem (if you have standard shift). And there are several companys that make universal cruise controls as a one size fits them all kit.

I didn't do it, no one saw me do it, you can't prove anything! "Bart Simpson"