what do I need to get so i can add some stacks to my 69 camaro? a new intake entirely? is there a mod?

 

Depends what kind of stacks, and what you are trying to accomplish. If you are looking for 8 individual intake stacks, you can change to Hilborn injection or to 4 individual 2 barrel Weber carbs with a stack on each barrel. Either way it is going to be very expensive and do little to add power over a good EFI or a good 4 barrel carb. If your engine is carbed, you could just add a bell mouth intake on top of the carb, and probably gain a few horses ( very few).

 

Or you can just buy the fake injection system that Garlits sells. It fits over a std. 4 brl carb and looks pretty real:
Garlits StreetInduction fake injection on t-bucket hot rod

 

^ Heeeeey, I could use a set of those, and the blue goes well too. heh heh
When the op was asking about stacks, I was thinking velocity stacks: Chrome velocity stacks,air cleaners,tunnel ram,holley | eBay