Parts Geek - For 1978 GMC G15 Intake Manifold APR 39985GVPP 5.7L V8. 1978 GMC G15 Vandura 5.7L V8. 1978 GMC G15 Rally STX 5.7L V8. 1978 GMC G15 Rally 5.7L V8. Notes: Engine Intake Manifold -- V8 Chevy Small Block (305-400), RPM Range 1,500-6,500, Multi-port.
