tufcj
I am starting another project engine. I have a spare set of bare 291-C heads that I'd trade for a set of buildable 090 or 993 castings. 090 or 993 are the 71-73 non-bridged heads. Since the 291s are worth a bit more, all I'd ask is you pay shipping both ways (probably around $125). One head was cracked at the corner head bolt hole, but has been welded, magnafluxed, and pressure tested. I'd guarantee it not to leak. These will need a full valve job. Cheap price for a set of 291-Cs.
E-mail with any offers or if you have a set of the 090 or 993 heads for sale. Pics on request, but it will take a few days, the heads are in my sisters garage (still in storage from my move).
Bob
tufcj