We run a sumped stock tank, it's a CE piece with 2 3/8 npt (-8) outlets that go to a holley Dominator 250 gph fuel pump. We used the original pick up as the return with a tube nut/-6 fitting.
Hope this helps
Link to tubenut fitting thingy. http://www.earls.co.uk/earls/hoseends/tubefit.html

'74 Challenger..9.46 @ 145.9 1/4, 6.001 @ 118 1/8 so far. 4023lb !!! # N/A, Marsh performance 655ci, Indy Maxx, T/R, Indy 600-13 X's, Street legal, pump gas, full interior, Cal-Tracs, mufflers, 3:73's and real 10.5 radials.
9.51 @ 142.4 1/4, 6.003 @ 114 1/8 with our old mule KB, 572-13, 580 wedge.
RHD '68 Barracuda Fastback 323ci street/strip. Best ET 13.88 @ 99.03