The 89 5spd had the best cam in it of all the others, but its not that much better to take the time to tear everything down to swap to it, unless you have everything torn down already... then its better just to go get a regrind that will actually do something for your car.
And yes, it will work in the auto cars as well.
Pegasus, the one draw back I see with a turbo and is the reason I won't go with one in the tbird is no matter what, your not going to get a turbo that can give that motor the bottom end grunt that a blower can to get these heavy boats moving. Go with a turbo that can spool fast enough at low RPM and its useless up top. Run a big turbo for top end work, and there goes the bottom end cause a six just ain't gonna give enough exhaust velocity at low RPM's to spool that sucker up to get the torque up to snap you out in the first 60'.
Its a catch 22.. gain on one end, lose on the other.... so don't be so quick to dismiss a blower as crap.