I have a 71 Chevelle St. Wgn. ( 307 Fact. A/C ) It is now a ( 1970 ) SS 454 wagon. NO I did not use a 70 front clip for looks the 71 was hit and needed a clip. I have LOTSA 70 El Camino stuff.
I used the dash from my 70 El Camino along with 70 underdash, and 70 under hood harness. THEN the fun begins !!!!!
Driving the SS 454 wagon for a month, Then decide to get the A/C up and running !!! A 71 STAND ALONE A/C harness is a little different than a 70 A/C harness ( relays and such under the glove box ).
SOOOOooooo I pulled the dash and stuck in the org. 70 A/C harness. All has been fine since 2003. It would have been a lot LESS trouble to install the 70 A/C harness BEFOR the, Front clip, engine, interior,seats.
Oh did I mention I FRIED the 70 printed circut board, While trying to get the 71 A/C harness to work with ALL 1970 Wiring............
My 71 Wagon is 100% equipped with 1970 wiring along with a GREEN AM/FM & Green A/C controls.
I think of wiring as, Giving someone first aid, The rule in " First Aid " If you dont know what to do !!! Dont do anything.......
P.S. My DAD always told me, " You never have time to Do it right, But you FIND time to do OVER ". Thanks DAD.