Originally Posted by Sniper X

First of all, 91K is a high mileage motor to super or turbo charge. I would suggest you first do a total rebuild on it and beef up the parts that need it for these applications. Those are ARP headbolts and studs, all highest quality head gaskets specific to turbos or superchargers, and of course do a search for the setup you can get and ask questions about what they also had to do for a tune for the OBC as well because that will have to be done. I highly suggest a supercharger kit either clean used one or new as it'll be WAY easier to bolt on and work better in all normal driving than a turbo.

The drawback of a turbo is turbo lag. an SC doesn't have any lag and is POWER right off idle if set up porperly and doesn't run as hot of underhood temps as a turbo. Plus, you might even be able to bolt on a SC kit to that motor you have and as long as you aren't always in it with the right foot, it MAY even last till you can rebuild it or get a crate motor. BTW with either, you may have to run thicker head gaskets or at least very low boost to keep them from grenading the motor since the stock pistons are too high a compression ratio for the SC or Turbo.

And of course, if you live where you don't need a smog check, you can build an all motor motor that will kick butt on a TC or SC motor that is stock other than the asperation.