Brake booster questions - need help!

[BossHogg69]

I pulled the black painted booster off my '69, and I have no idea if the truck originally came with power brakes or not. For a little background, my grandfather restified the truck back in '91, adding a/c, a 454 (had 307), turbo 400 (had pg) and made the interior look like a '72 (door panels, wood grain decals on dash/glovebox). He even used the '72 only BB motor mounts when he swapped in the 454. So for all I know, he may have added power brakes during this process. I am now completely going through the truck and updating everything. So, that being said, I don't even know what a factory '69 power brake booster looks like. It looks like if you put the mounting surfaces together, the rod to the brake pedal on the new booster would still be too short.

Anyway, I ordered a brake booster from CPP after mine took a crap, and it's nothing like what was on my '69. Hopefully someone can offer some insight or help identify what the black booster in the pic came off of, or if i can make the CPP one work without too much trouble. I ordered the new booster months ago, so I doubt I'll be able to return it. I'm not in a serious bind, as the motor and tranny are out of the truck and I'll be converting it do 4 wheel discs, but I do need to know if this booster will work or not, or if I have the wrong booster altogether.

Thanks in advance for any insight offered here.