[6pack] radiator fan switch

[j.honor at comcast.net]

I haveB a 74 TR6 with a new aluminum radiator with integrated spal 16 in fan.
it has no temperture bung so i cannot install a thermastat in the actual
radiator. my options appear to add a simple on/off switch with relay/fuse or
is there also a way to integrate a thermastat that will not involve with
actual radiator. this new rad/fan is replacing stock radiator with hayden fan
so electrical platform is ready as needed. regrads, Joe