Big Cam 400 tips

I did some polishing this weekend for my neighbor in exchange for a set of BC3 400 Injectors rebuilt in March and used for a couple weeks before they made a hole in the block , and he bought a BC3 off of ebay but his customer doesn't want the pump since his was rebuilt in March. So I'm gonna buy that pump for $200 its brand new in the box

Could i use these injectors if i decide to take off the STC? The injectors on the truck right now were put on new a couple months ago but im guessing that they're special to use for the STC system?

I'm i gonna have to send the pump to get calibrated to my engine specs since its a BC3 Pump? Sorry if i ask to many questions but id rather ask before i start messing around than be asking when i cant put it back together.

 

Sounds great Ill ask tomorrow so i can get all the leftover internals off the engine with the hole in the block just in case i ever need them i cant tell if the stc is working properly because when its cold it leaks from the shaft and its very sluggish on acceleration but after a couple minutes the leak stops and truck runs ok but i think its sucking air through the shaft cylinder is getting looked at this weekend hopefully ill be ready Monday so i can replace the pump and start to get it ready to go to work