To save Don the trouble of asking, there are several engines that could be used for that year. Do you have the rest of the engine's model number, or a serial number? According to Volvo's website, there was a 5.0GL as well as a few other models available around that time.
Thanks! The PPW from the servicing dealer must've been inaccurate for the model #.5.0GLPEFS is the real model number for that serial number. Plug gap is .035"