For all you speed demons who havn't seen this on fleabay.
A set of heads don't get much cheaper than $180 (at time of posting) and the rest of the bits are free.
http://cgi.ebay.com.au/Harley-davidson-Engine-Parts_W0QQitemZ300358504492QQcmdZViewItemQQptZAU_Motorcycle_Parts_Accessories?hash=item45eec3102c