I think the '70 CL bikes are all 2 cylinder http://oldmanhonda.com/MC/wiring350K4.html
IIRC, the 1970 CB and CL 350s share the same wiring. There's a few differences between the two (exhaust, tank/seat, tires, etc) but the wiring was the same.
Which ever way you go, it sounds like it'll be...