I am just tying to learn more indepth about technical specs. I bought me a set of heads for my FE 390 hot rod and they have high performance 1.440 valve springs installed on them. Does this number indicate how tall the springs?

Second question. The heads I bought have been vatted and steelabrated. What does this mean? Also they have under cut valve stems and a 3 angle valve job. I dont exactly know what that means.

I kinda feel a little imbarrased to ask these questions since I have been a grease monkey since I was 3 gofering with my dad and am now 21, but I guess its the best thing to do and the best place to do it at to learn.

Any info would be appreciated. Thanx,
Don