I would have to advise against the idea but lets assume you found a manifold that would work, how many miles are on that blower? if its any where near 100k id say forget it. I had a 90 T Bird SC and mine went at 95k. I have met many others that said there's never made it to 120k. your also talking about adding a pulley and tryn to get more out of it which will resualt in an early grave. As Strokd85 mentioned, you will need to upgrade your fuel sys.

IMO its going to be a long road of bs to deal with if you go that route and it would be less of a pain if you just saved and found an app that has been tested on your setup. You have no data to start with and that means trial and error aka lots of cash to spend. Do you have a tweeker or anything to tune your car with??

JY Turbo kit???I believe itsturbo.net will sell you the headers and any other parts you need, also visit the JY turbo group on Yahoo to find others that have made JY kits for stangs. I found my kit on turbomustangs.com

Matt there was a kit forsale using a set of Mark VIII manifolds floating around but to be honest im not sure if its still forsale or not, its been weeks since I last noticed it.

Good luck