change multiple blocks at once

[LaneClare]

I have about 100 blocks. They are different in many ways, but all have multiple linear distance parameters, and these have the distance max set to lengths (all of them have different lengths).

 

I'd like to be able to change the distance max without having to open each block and do this manually.

 

I don't know if this is even possible, but I can't imagine that it isn't....

 

Is it possible to export block info into Excel and then change it in Excel, and reimport into AutoCAD, saving the new information?

 

Or is there another way, through Lisp or some other part of AutoCAD that I don't know about?

 

Thanks.