I think you're just wasting money, but ok...
The kit SHOULD include an exploded drawing that includes all the parts in the pump...match 'em up with the parts in the kit, noting VERY CAREFULLY "which way is up," and replace all the ones in the kit that match. Since you have a "one size fits all" kit for several obsolete toilets, there may be parts in it that don't match the ones in yours. There may also be parts in it that DO replace parts in your Bryden Boy, but aren't exact duplicates...because the new parts are supposedly improvements on the originals. Rebuilding a toilet isn't even close to "rocket science," but it does assume a certain amount of mechanical instinct and ability...so if you aren't the mechanically inclined type, I recommend you get help from someone who is.Your toilet is at least 15 years old...it could be even older. It was never built to be a toilet to last 100 years (Wilcox-Crittenden builds a couple that are, but they cost $800-$1000). So remember two things: 1. rebuilding it may improve its performance slightly, but unless it's had less than 2-3 years of cumulative use, the pump cylinder is too worn for rebuilding to restore the performane to anywhere near original specs. 2. No hardware parts are still available for it. Odds are about 100-1--because Murphy was an optimist--that within a very short time after you rebuild it, something you can't replace will break. But it's your boat, and your choice to rebuild and replace. All I can do is warn you.