I have a guy wanting to do some trading and has these heads with an intake, new in the box. I have done some looking and cant find any info on them. Any help would be appreciated.

Might be a casting #, rather than a part #. I Google'd the part # you gave and got nothing specific from the returned links.

I dug this out of the OLD Moparts Tech archives and don't see it as a part # for any of the Stage VI variations offered over those years:

"I found '96, '99 and '02 MP catalogs and
have listed what they offered each of those years. You'll notice they've changed the
offerings a bit and there are numerous part number revisions.
1996
Standard, bare-------------------------------4529335
Standard, unmachined guides and seats--------5249051
Ported, assembled, 2.14"---------------------5249113
Ported, assembled, 2.18"---------------------5249523

1999
Standard, bare-------------------------------4529335
Max Wedge port, small chamber, bare----------5249579
"Street" Stage VI, non-raised intake port, bare------4876311
Standard, assembled (500/545 crate engine head)-----4876991
Ported, assembled, 2.14"---------------------4876186
Ported, assembled, 2.18"---------------------5249523
CNC-ported, assembled, 2.18", flat-tappet springs----4876382
CNC-ported, assembled, 2.18", roller cam springs-----4876383

2002
Standard, bare-------------------------------4529335
Standard w/ CNC-machined chamber, unported, bare----4876819
Max Wedge port, small chamber, bare----------5249579
Max Wedge port, standard chamber, bare-------4876818
"Aluminum 383/440" head, non-raised intake port, bare--4876311
Standard, assembled (500/575 crate engine head)----4876991
Ported, assembled, 2.14"---------------------4876186
Ported, assembled, 2.18"---------------------4876187
CNC-ported, assembled, 2.18", flat-tappet springs------4876382
CNC-ported, assembled, 2.18", roller cam springs-------4876383"

Post a few pics and I'm sure someone will be able to help identify what they really are. My work is done here...

First, I think the number is wrong, try: P4532657. These are Mopar St6 heads, you can see same from this link on Ebay:

http://www.ebay.com/itm/251782543089?_trksid=p2060778.m1438.l2649&ssPageName=STRK%3AMEBIDX%3AIT

Ask about the spark plugs, if they are angled or straight, if angled they are the same heads as in the auction. Need offset rockers.

I appreciate the help so far. Have not seen the heads, just going by what I have been told. I'll have to get some pics or go look at them.

Thanks.

I do have some experiences with them, and they are machined in different versions. (I have most of them in my shop) Please share the pictures, and I will try to assist you!
Kind regards
Oyvind Mostad / Norway