Ok guys, this is my problem. I have a 90 gt with an 86 block that has about 186 thousand miles on it. I the only thing stock on it is heads. I was wondering if I were to put a vortech on it and run say 10lbs of boost do you guys think it would hold up long enough to get me to the end of the summer when I am going to build my 331. Also do you think it would be alright to run the stock heads with the charger? Or do you guys think I should just wait untill next fall and build and supercharge a 331. And also what kind of gas milealage would I be looking at with he supercharger. I will also be getting a little banger truck to drive everyday so I probably wont be driving the car most of the time. Any help, or hints are appreciated guys. thanks.