If the kit is like it used to be, there are no springs/retainers/locks/seals or spring cups.

They are "bare" unfinished head castings.

The guides are not sized(valves will not fit into guides), valve seats are left blank, deck surface doesn't really have a "proper" finish.
They didn't used to come with the drainback holes drilled and tapped, but I heard they do now.
I'd ask if you contact them.

To finish the heads with the minimum work needed to be able to run them(and make enough power to have made it worth buying B1 heads in the first place), you're looking at an additional $800-1000, plus the cost of the missing parts...... Another $700-1000+, depending on what the spring requirements for the cam are.

Koffels charges about $1450 to fit the guides, cut the valve seats, and Stage 1 porting(I don't know extensive their Stage 1 porting is).

From what I understand, the kit now comes with T&D single shaft rockers, although I'm not sure if they have the optional clearancing done to clear springs with a larger OD than 1.550.

Again...... Worth asking if you contact them.