Base Class files?

[bwrobinson13]

I made some rather extensive mods for minecraft 1.5.4 and havent modded since but i am looking to get back into it, and i was wondering what happened to all the base classes for everything in minecraft? like the classes for all the blocks and such? i cant find them any knowledge on this would be much apreciated

[RANKSHANK]

which mc release? the 1.8 version I'm using is in the fml src 1.8. (fml build release) .jar

[bwrobinson13]

1.7.1.  I used the forge gradle install method? I very new to the gradle system

[Eternaldoom]

In eclipse, it's under referenced libraries/some forge jar