power to elec seats in my 70T

I am putting elec seats from a 92 c-2 in my 70T. The question I have is where should I get the power from. I know some of you have done this and though you can let me know how you did it. Also, a dumb question since I am not an electrician, should I run it off of a relay.

thanks

the relay is in the seat, i believe. get the wire loom too. you'll need the plugs. there's a constant hot, a ground, and a hot w/key, so that's your typical requirement to operate a relay, so it's got to be in the seat already. adapters req'd also. late seats are narrower.