engine number

[FC_fer_me]

I know it's probably been covered before,( I did a search but came up empty handed), but could someone explain the prefixes on the grey motor engine numbers. I know the FC ones start with L but the engine in my new project car is numbered B285240. Just curious as to which model this engine is from.Thanks in advance, Dave.

[mcl1959]

FX AND FJ up to the release of FE have no prefix
FE and FC have L prefix
FJ utes and vans made after the release of the FE have U prefix (these are rare to find)
FB and EK have B prefix
EJ has J prefix

Ken