Found a sad looking 7500 with some beefy upgrades this morning. It is ugly, dirty and the plastics on the IO area have some big chips out of them.
It fires right up and actually holds some upgrades. I found a PowerLogix G3 processor, 512 MB RAM, Sonnet Tempo ATA133 card in the PCI slot and an 18 GB, 50-pin Barracuda SCSI drive inside. The PowerLogix splash screen reports the CPU speed at 1000 MHz (?) but Mac OS 9.1's System Profiler reports it at 557 MHz. Not sure why they are different but it is a PowerForce 750GX G3 1 GHz processor with 1 MB cache. Maybe I'll try installing the PowerLogix software.