You asked what it would cost to rebuild a 292. Here's a remanufactured on that auction site. Sorry about the link but it does have a pretty comprehensive list of what was done.

http://cgi.ebay.com/ebaymotors/GM-4-8-L-...1QQcmdZViewItem

I wonder where they got the graphite coated pistons?

Larry

Ignorance can be fixed Stupidity is forever