I'm going through the same thing, and am converting to manual brakes. The whole process took about an hour or two, except for one little part. Here's what I did a couple nights ago:
1. Unbolted the master cylinder from the brake booster.
2. Removed the brake booster (and found perfect factory mounting holes for manual all ready to go).
3. Mounted the master cylinder against the firewall.
Yesterday I ordered an adjustable brake push rod from Summit for $65. This connects from the brake pedal to the master cylinder. Once that arrives, the conversion's done, and I never, ever have to worry about vacuum again, will have less weight under the hood, and will be able to feel the road better. I've never done this before, but wow it was easy.
I don't know if it helps or not, but thought I'd offer the suggestion. Cheers.