Hi zErec.
You should think twice before you put a CPU on a PCI slot. THe PC bandwidth will be very tight to a CPU, and furthermore wouldn't be enough for the remaining set of devices of the motherboard.
If you for some reason wish this "form factor" you should go for a 7300,7500 or a 7600. Some of them could go up to 200 Mhz and possibly reach the same power than a PCI upgraded CPU.
If you wish and old world mac you should go for the 8500/8600 or 9500/9600.
All these systems can be upgraded with a more effective G3/G4 daughtercard.
My final advice is that you don't loose your time and money and go for a Sawtooth, or a MDD beter yet