valve springs....questions

[Old Guy with 87 GT]

thanks for the reply jeff........i'm definatly interested ,but i want to wait before committing to buying anything ,.....they sound like a good deal but they might be more then i need for what i'm running ......my plans for this car are kinda mild (low 13 range)

i did have some dumb questions about what all would be involved with using them though(bare in mind i'm kinda new to building perfomance moters).......

???hardened shim cup ?(part of the retainers?)what are they and if i'm running a rather mild lift/rpm range are they neccesary

??? the smaller valve stem seals ...i have a new set of seals that came with the fel-pro set i have ...i was wondering if these would work and what all is involved with changing them?....can they be canged relitivly easy by an amuture like me?....(the ones i have are part #8-70817b and 5p00555....i'll check with comp cams to see if i can use them ,if not then i'll have to find out witch ones i need and how much they cost)

btw ...cool web site dude