Back in the dim past I had a need to stick a 370 socket CPU in a Slot 1 motherboard. Asus made an adapter that did just this task. I recently found the manual so before I chucked it, I dumped it into a one page PDF in case it was any use to anyone so here it is. Enjoy.
By way of background, these cards supported Coppermine and Celeron CPUs and gave owners of existing slot 1 motherboards an upgrade route from their existing Pentium II/III processors.