new car aircon retro fit and warranty situation

[nickfb1]

Im currently looking at buying a new T350 one of the ones ive seen doesnt have aircon, i Told the dealer i wouldnt buy it without aircon.
He has offered to fit it and add 1k to the overall cost.
They are fitting it not TVR.
As this dealer is over 200 miles away the question i have is this:-
How might this alter the 3 yr tvr warranty and potentially what might be the issues of using my local dealer for warranty work.
My local dealer has said that they dont mind doing warranty work if i buy from another dealer, they know i would ideally want to buy a car from them but cos of the price increases im restricted to looking at new cars in stock under old price list, but not sure how retro fitting a/c might affect all this

>> Edited by nickfb1 on Wednesday 17th August 17:25

[nickfb1]

Suppose it comes down to money, The dealer in question has said that the parts for the a/c are 1600 and 12 hours labour to fit so i suppose about 3k in total, according to him some changes need to be made to the rad layout.
However he has agreed to fit it and add only 1k to the cost, which is in my budget.
If i take to my dealer i suppose im looking at another 3k on top