Hello. I just read your post with regard to "bison's mfs5957" turbo. I am also considering upgrading my TA49. I have an '87 Turbo T limited. Everything rebuilt or replaced last 4 years. No Alky, No head work. Just a good valve job. Dutt neck. Running the max boost on 93, 17 #'s. ALL the bolt-ons. Plus suspension work. My converter is a 3000 stall speed 10" unit. I live in Massachusetts. I plan on going down to Connecticut in the spring. The car runs great, but I would like him to tune for the most power. Giving the fact that do not have Alky or head work. I don't know if the turbo upgrade will be cost effective. By the way, what does the "mfs" stand for? I know what the numbers represent. But not the letters. Thanks...