Thermostat part # for '91 LX?
 

I have two Mazda thermostats here- trying to figure out which is the correct item for my '91 LX w/ DOHC.
The part #s are:
F201-15-171A
8AB8-15-171
The 8AB8 part has BP05 NTC stamped on the thermostat itself while the F201 part has F201NTCL on it and both are 85/88 deg. Celsius parts.
Can anyone tell me which is the correct part for this car?
Thanks,
Chris