I don't have a turbo yet, however, planning on installing 86/87 turbo on my 84 GN in the future. The reason I want to upgrade the 86/87 turbo is to increase it's booast. Would this be a waste of money or would it be wise to purchase a new or used aftermarket turbo? By the way, I just purchased a Turbomotion kit and will be upgrading to an intercooler. Planning on installing the kit on a 4.1 . Any input would be welcome.