Lowering.
 

Have a big block with stock suspension. Gotta drop her 2-4 inches. Whats the easy way to do this, economically speaking.

Welcome to chevelleforum ,I would assume lowering springs would be the least expensive way to lower it but not sure. Just dont lower it by heating your springs with a torch as it makes for a rough ride.

I installed 1.5" drop coils and I like how it sits. If you want to go lower, try 2" drop spindles.
I bought my springs from these guys:
http://www.classicperform.com/chevelle.htm#18

Welcome Gary. I would check out what Brian said.

drop coils.
 

Thanks guys. Cpp is local and the price is good.

I bought a set of Eibach 2" lowering springs for my small block 70' and it turned out great, happy with Eibach and reasonably priced