Injectors depends on what power you want? if your not going to do any turbo mods then Siemens 60lb Dekkas should do, but if your looking for more power down the track go with 80lb dekkas or id1000's. As for valve springs I think you'll definitely need them being a BA. I think Nizpro have good springs, otherwise most use crows. Ps on a side note, being a BA you have weaker rods so its a bit of a ticking timebomb on your bottom end with big power, as well as the gearbox