I have an 1980 Camaro Z28 with T Roofs. All original numbers matching with 23,000 kms. I am interested in changing and upgrading the entire suspension system on it and changing to disc brakes. I would like to get more power to it and was wondering if I made changes to the engine as well would the value of the vehicle depreciate or increase. Your feedback and recommendations would be greatly appreciated.

 

Well these days it's a mixed bag,some folks like the mods others like stock. What I'd say is don't do anything that can't be undone and save all the stock parts
Maybe pull the stock original engine and stash it away then build another for more power,350's are pretty easy to come by and cheap to build compared to anything else.
Great looking car by the way,welcome aboard.