383 head questions

hey guys i am rebuilding my 1968 383 engine. i have a few questions about the stock 906 heads.
what type of valve seals do i use. if anyone has some pics that would be great.
can i use the exsiting valve springs? the engine is 383 super comando. And i will be running a 69 383 335hp stock cam.
can i use felt type head gaskets? the old head gaskets were steel.
thanks for any info.