I have 50# and will need larger for 300whp + which I'll get later. Should have just gotten 60-80# to start lol.
As far as the engine management, you don't really need anything other than a good tune from either:
Fernando @ RPS
FF Authorized Reseller
I do LED conversions: Focus / Cougar / Contour / Scion TC / Mustang / Fusion / Milan / Escape