my 91 CRX Si just decided it didn't like its crank pulley bolt anymore, so it got rid of it somewhere on the 15 freeway.

Anyway, the engine appears to be ok, the woodruff key that keeps the crankpulley, harmonic damper, and crankshaft all aligned properly is still in its slot, and for the brief time I ran it (then discovered something was very wrong and shut it off), the engine idled just fine, so I'm pretty sure the timing didn't change. So, on to my question...

First part is what really concerns me. The car is sitting in the parking lot where I work, and I don't have access to any of the proper tools here, nor can I just show up with a bunch of equipment and start working. So, can I just bring a ratchet and socket, tighten the nut as far as I can get it, and limp the car home? Please advise, I'm without a car until I can get this fixed.

I need to know how to torque that nut down. I know the specs, but what I'm wondering is, what is the best way to keep the driveline locked so I can put 150 ft.lbs. on that bolt? Is it safe to put that much force on the bolt with the car resting on its wheels in gear and the parking brake engaged?

Any suggestion is welcome, please help. Thanks!!