Plandon, As the old saying goes, "if it ain't broke, don't fix it. " These old mechanical pumps last a long time. Of course there is good and bad exceptions in all things. I have several TDR member friends with newer trucks that are on their third electric fuel pumps before 50,000 miles. I have talked to others with the mechanical lift pumps that have over 200,000 miles and up. New modifications are not always the best. Its just hard to beat the OEM parts for these older trucks. Just my two cents worth.
Chuck :-{}