I know what your going through my friend. I myself am a schooled technician (well Kinda) but my friend Tim C has TONS of experience and its like born into his blood. He makes me look like a fool when it comes to the understanding of some of these systems, and we were the top two in the class.
Anyway, it took about 5 hours to install my BBK pullies.

We had to take the alternator off, oh heres a word of advice, hold the pully with your hand then use the impact (dont set it on super Torque mode though...Ouch). You dont need a vice. TO get the Crank pully off, we had to remove the coolant resivior and the cooling fan, we didnt have to take the radiator out though. We also had to go and get a big enough pully puller, that added to the time.
Oh and one of my bolts that hold the coolant resivior on came Striped from the factory..Oh yeah buddy, that sucked.

That added about and hour and half of extra work.
What kind of impact if your friend using thats so big it wont fit without removing the radiator? Is it something from the 1930's

I'd ask some of your other friends who might have a smaller one if you could borrow theres before removing the radiator.
Simple two hour install my A$$. Well I imagine that since I know what to expect now, I'd be able to do it a hell of alot faster. Good luck. Be sure to torque the crank bolt down all the way to specified torque to stretch it, then take it out, apply locktight and retorque. Dont want to run the risk of the damn thing coming out, That would Suck majorly.
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64 1/2 "D" code Red Mustang Coupe. 289, C4, 3:1 rear gear. Mallory duel point. Ported & Polished 65 heads shaved .01 with 351 windsor valves, 11:1 comp, 1.7:1 sled rockers, blue wolverine lumpy cam, modified autolite 4100 Hipo 4 barrel. And to many others to list
2000 Perf Red Mustang GT. 5spd. BBK Underdrive pulleys, Flotech off-road H pipe. Hurst T-Handle
64 1/2 red 6cyl coupe. Auto. project car.
[This message has been edited by Mercury (edited 05-24-2001).]