[ryans69chevy]

Wow all very suggestions! Thank you all.

You just have purchased the kit before your cab was painted to fit the computers?

I'm wanting to prep my cab now so I can add the heat/ac later when the funds are available so I won't be able to have the parts in my possession which isn't the ideal thing when prepping I know...

I've searched this site for adding ac to a non ac cab and found the original cabs with ac are more of an oblong type hole vs the vintage air kit which from their site looks to be a 2 1/2" hole. I've also heard of old air kits which I'm not familiar with or haven't checked them out yet. Not sure if they use a different size.

What size should I cut my dash holes to? It sounds like oem and aftermarket vary in size so I got to be sure I choose the right one. Which one is better between oem and aftermarket?

Like I said I don't the funds right now to purchase a kit. I guess you could say I'll be committing myself to an aftermarket kit sometime down the road whether it would be vintage air or old air, but as I understand it I could use either oem or aftermarket size dash louvers, which vary in size...