I purchased my kit from TUCKERS in nevada.
It was on sale at the time. The Box said P.O.L. so I believe it is a performance on line kit.
Stock kit.
Manual Master cylinder.
If I had upgraded to the power kit I would of had to relocate the cross member.
...pic... The power kit is preferred.
Other things to consider.
up grade to tapered wheel bearings Basic kit at that time did not include them.
On My 50 I had to drill out the spindle mounting holes for the backing plates (May not be the same for your year truck)
...pic... My wheels did not clear the calipers.
Ran all new brake lines.
NO INSTRUCTIONS with the kit I got.