Vortec 454...?

[Rede]

I found a 454 pulled out of a 1999 2500 with 130,000km.
Comes with all accessories, wiring and PCM.
Run great when pulled.

Besides an electronic fuel pump, is this a difficult task to drop in an 80's k20?

Only reason I'm asking is that it's listed at 750 beans vs a greasy old school 454 with 250,000+km for 650.

I'm about to yank the 4spd and put in a th400 and since I just got my holiday payout from 2009.... well....you know...

just tossing it out there before I buy something else then kik myself that I didn't jump on a good deal however I don't want to go crazy on a winter beater/bush toy.