Hey, Heres what I came up with. These part numbers are for all SBC intake manifolds. Doesn't brake it down to specific vehicle.
Intake Manifolds.
#346250 1976-82 305/350 cast iron Q jet.
#458520 1977-82 305/350 cast iron Q jet.
Quadrajets.
#17059218 1979 Malibu 2.29 axle no A/C.
#17059222 1979 Malibu 2.29 axle W A/C.
#17059582 1979 Malibu no A/C.
#17059584 1979 Malibu A/C.
The carbs above are for Automatics by decoding the casting numbers.
Heres the only Q-jet I found for a Manual transmission.
#17059207 1979 El Camino M/T
Here are a few other Quadrajets that could have been installed on a 1979 305 Malibu W M/T
#17059203
#17059207
#17059217
#17059505
#17059507
Doug