A more likely scenario is the oil sloshing away from the pickup on acceleration and the pump sucking air. A rear supm pan and baffles cures this problem.
1949 Mercury coupe
Nosed, Decked, Frenched
58 T-Bird interior
472 w/toploader 4 speed OD
Performer RPM w/Holley 3 barrel
Isky 304 degree solid cam
Narrowed 3.25 9.5 inch with Detroit Locker