I recently purchased a 91 suzuki samurai and i want to change it over to power steering, anyone can help with the parts i would need to make this successful?

i just did mine, get the sidekick box,pump hoses reservoir and steering shaft from column to box. and you will need an lower pulley. i did all mine myself without a kit but i have access to welders and machine shop equipment. The newer lover pulley had 5 mounting holes where the 1.3 has 4 i welded up the holes and redrilled using old v belt pulley as a template. i then machined off the pulley closest to the engine. this took some time but i was able to take off the pulley without removing very much from the hub. then i double stacked the pulleys. v belt closest to the engine serpentine next. i bolted up the box using 1 existing bolt the drilled the frame for the other 2. i sleeved the frame and welded the sleeves in. the steering shaft was next cut the rag joint off wend the sidekick u joint onto it you need to test fit it for length . i welded a little bit at a time to keep the heat down. i made a plate off the 4 bolts on the side of the block and cut and welded the pump bracket to it. i had to shim the rad mount over 1/2 an inch. then mount the reservoir. drive it to the parts store and fit the belt. probably about 8 hours total in it but well Worth it

As stated, if you want to use trackick PS, you need the PS box with pitman arm, the PS pump, the lines and reservoir and crank pulley.  It can be adapted over to the samurai with minimal/no machine work...just some cutting, drilling and welding.

If you can find a double pulley from an early trackick (89-90...maybe 91), they are stamped steel, instead of cast.  Meaning you can separate the two pulleys (they are held together with "pins"), and the outer pulley will fit inside the stock samurai crank pulley (the holes do need to be redrilled, for it to bolt up).
To mount the pump to the block, just use a flat plate and drill holes to bolt the pump to the plate, and the plate to the block.
If you can get a non-ribbed type trackick steering shaft (found on earlier trackicks), you can cut and join it to the samurai shaft.  The ribbed type shaft will work, but it isn't quite as easy to do.
I also recommend putting a plate on the outside of the frame, opposite of the PS box.  The way I do it is to just drill holes in a plate and use the PS box bolts to hold it in place.  Probably not really needed, but it is easy enough to do.  I have used 3/8" plate and also 1/4" plate.
I have not had to shim the radiator or radiator bracket over, for steering box clearance.  The box does sit right up against the bracket, but it does just fit.