Only buy the AC Delco. Stay away from the Bosch pump. There are some other brands, but the AC Delco is one of the best, and costs a reasonable amount. Do not forget to use the 5% discount code for Rock Auto if you get one there. I have a used one for an LT1, but I have not tested it, and do not know how good it is. I would sell it for $15 plus shipping. I am going to pull a sender unit from a 92 wagon later this week, and I can get the LO5 pump from that. The car was driven in to the yard. There is also a 96 RMS that was driven in, and I could pull it as well. I would charge $40 plus shipping for either.