brake booster on a 67 GMC?

[hpcgmc]

I've got a line on a brake booster from a 1972 chevy pickup for $50. The seller says he thinks it will bolt right onto the firewall of my 67 gmc, and then I just bolt the brake master cyl to the end of the booster and bend the brake lines a bit to get them to fit the new position. Is it really this easy? Anything I should check on the brake booster to verify that it works well?

If I upgrade to some sort of disc brakes in the future, can I still use this brake booster?

Thanks guys!