If you want something with more power than the Z31 pump, you're more than likely going to have to do very slight mods to get it to work, or at least soem elbow grease. If you can't find a good used Z32 TT pump, the Warlbro 190 or 255 pumps are very good also.
Zbum, what else needs to be changed besides my 02 sensor to accomodate the 87 ECU? This is hypothetical, as I'm not sure the ECU is fried but suspect it.
Others, what modifications are necessary to install an aftermarket fuel pump? The $450 price tag is pretty high to just replace a stock item, so I'd rather replace towards the upgrade coming in a few months.