Ok im getting ready to have my firewall prepared, i asked the body shop guy and he told me i need to get rid of the stock ac because it will not allow space for the ls (lq9). i know ive seen many ls swaps using stock a/c so im pretty sure thats bs. But is there any reason why i should go with a unit like vintage air over stock? its like 2k + of money that will never be back, but i dont want to drop in the engine and find out that the stock ac system is all trash. Also, do need to run any special vove covers in this swap? He mentioned that there will be no space to remove the rear plugs. TIA
I answered this once, but a more in depth answer : your guy is correct that the rear plug on the passenger side will suck to change if you run headers and it will still be a pita with stock manifolds. But not even remotely close to impossible.
The chance of something in your stock system being trash is not poor. But the parts are obtainable. AFAIC, working on a stock heater box is more awful than changing #6 and #8 plug. He can also vacuum test your evaporator to be sure it’s good. Hoses can be made, and the condenser is not hard to find (I’ve thrown out/scrapped 3 good ones - oops.)
The picture posted by DPF (Diesel Particulate Filter?) 84 Hurst above shows off an AC compressor mount that makes the swap a bunch easier.
With this being said, I’ve put a delete panel into every swap I’ve done and I have no heat, AC, defrost of any type other than Mother Nature. It is interesting when driving on foggy mornings haha. But also, none of my stuff is show car type builds. But, the amount of room is silly once the heater is gone. And after doing a manual brake conversion there is even more room.