[rant] took me 15 minutes of searching on the LEM Facebook page to find this link...[/rant]

http://www.jcsenterprises.com/Japamacs_Page/Processors.html

That is a good source for swapping different model's cpus. The main difference to consider is your FSB and how it will affect the speed. The short answer is you could swap easily to a dual 1GHZ and then overclock to 1.2GHz from there.(Sorry, can't remember where those overclocking instructions are)(or, go for an early MMD with the 133 bus) As for swapping a 167 MDD into a 133 quicksilver, you'll need to follow the above link's instructions.