Just went thru this w/ my buddy and his car.... you have to do the same when adding Vintage Air to a non a/c car..... he is just fresh as a Bird owner (3 mo.) , and couldnt beleive it when he found out that his "just install the A/C" was delayed quite a bit by us having to remove outer , inner fender and hood to get to two of the bolts to remove the heater box .... ...