Author: PeP (c83-254-252-144.bredband.comhem.se)
Date: 12-20-2008 09:02
The 7404 is not a direct replacement for the 7408, and hence you can't use the same schematic.
Download "chips350.tos", double click to extract the hypertext archive, view with ST-guide or HypView.
Link: http://www.nic.funet.fi/pub/atari/hypertext/
There are pictures/instructions for like 4 different clock patches. Don't try them all at once. It's in german, but you'll figure it out hopefully.
(btw - please try not to write a complete novel with every post. Apart from being bloody annoying it makes it a lot more difficult to answer your questions)