read a post tuesday night on converting to a combination valve. Someone stated that you can buy a 71 valve at gmpartsdirect.com for $55. Can't seem to find it on the website. Anybody know about this post or even have a part number??? Tried the search function but couldn't find the post.

http://www.chevelles.com/forum/ultimatebb.php?ubb=get_topic;f=7;t=007853#000000

GM part number: 1257177

Its actually the number for a 72 valve, but I hear 71 & 72 are the same.