440 Source Big Block Alum. Cylinder heads

i got a set just now...
going to put them on in a few weeks or so.
i only have 509 hydrolic cam so im just changing locks to better ones.
lapping valves and getting a 30* back cut on them.
For price,stock port locations... and no edelbrock stamp real big (which was a concern for me) i wanted it to look like a fairly stock motor.
Good heads,good price.
They suggest specific arp bolts and head gaskets...go by what they say