I am looking to upgrade the wastegate system on my 1987 Buick Grand National. I do not like the tuning of the OEM wastegate. I am hoping to find an HKS setup that will work on my car with the mods that I have done thus far. I have seen HKS setups online on GNs, just have not goten good answers. I am just looking to tune my car better. Trying to get the air/fuel right. With the mods that I have done, it should be runing faster. If any one has any info on a successful setup that has worked, I would be greatly appreciative. I was also thinking about getting an EVC Boost Controller. To get all the parts to work well with each other. What dose every one think? Please email me back at CapsCarey@aol.com or just reply on the forum with any more questions or suggestion. Thanks, Jason