@DrRocket is dead on correct re the local parts stores with knowledgeable staff. Local stores cannot compete on price on all lines while they support the nit picking details.
True story. I once called the regular parts store and ordered a water pump-note; at that time the counter man must jump to the catalog of rebuilt water pumps first. After stating the engine size he cut me off and asked how many heater outlets were on it and when I answered he just hung up on me without ever asking who I was. Not long afterward the delivery truck arrived with the correct part and I continued on. Weeks later I was in that parts store and asked the parts man about the pump and he just matter of factly said that they were very busy and he didn’t have time for any small talk and guessed that the part was OK since he got a core back and he knew who I was so I didn’t need to introduce myself. Now that’s a Pro.