so i guess some one can delete this thread cause its worthless.
Dude you have to be more patient, we aren't all sitting around waiting for your posts to see about answering your questions. With the headers if you go with a quality manufacturer you should be alright. I would get ceramic coated.
On the cam thing all I found after about an hour of google was this.
A boat with a 454 about the same year would have
exhaust lift .301 duration 227
intake lift .301 duration 211
no its not that i was bein impatient i just figured most of it out.
but anyways
i did check out comp cams and the one you have a link to i had figured that was mainly stock. so i think i am going to go with the rv grind version that is just bellow it.
i also got some gibson headers
and am getting 50 series bigblock muffler from flowmaster.
but thanks man