The CHI and AFD heads are basically the cat's meow on Cleveland heads. I'm not 100% sure about the TFS heads, but the Edelbrock heads are 2V style heads. Flow rates for either are in the 270-280 range from what I've seen. The 3V CHI heads will flow about 340cfm.
There are intakes available for about every situation....8.2" Clevor, 9.2" Clevor (standard 351C deck height), 9.5" Clevor, etc.
The header bolts that you mentioned are commonly used. You can also use an allen (hex) head bolt that will give you more room.