LS swap in my '72 GMC Sierra Grande.

[Billet man]

Hey, I'm planning a LS swap in my 1972 gmc and have a few questions. I got the LS swap manual from LMC and it has a lot of great information. I'm wanting to use ac with my truck but am curious if I'll have enough room to just use the stock mounting brackets already on the LS motor? I haven't gotten a motor yet but I am wanting to get a donor GEN 4 LS corvette or camaro to use. Does anyone know if we have enough room in the engine compartments on our truck to use the stock ac mounting location? And help will be much appreciated!!