[csx700?]

on the 289 comp cars:
manufactuer - stewart warner, type 240A
early 289 - inside the trunk mounted on the drivers side about 2/3 of the way toward the trunk openning mounted on the verticle surface or side of the trunk. one pump
late 289 - mounted between the roll hoop legs on a bracket that is welded to the rear suspension diagonal brace tube for the left rear suspension shock, one pump
*both early and late cars utilized engine driven mechanical pumps and the electric units were for boosting the the line presure when the fuel system was on reserve circuit primarily*
427 - where CSX3183 said. two pumps

c.s. now uses faucet (bendix style) pumps on thier current production.