Vortec heads, without the vortec look?

Chevrolet 1996 - 2002 Cylinder Heads - 906 Castings Assembled

Engine Quest CH350I & Other cast heads - Don Terrill's Speed-Talk

EngineQuest EQ-CH350I - IMCA Sanctioned Sport Mod Head

EQ CH350I CAST IRON PERFORMANCE SB CHEVY CYLINDER HEADS WITH PARTS Kit

EngineQuest Engine Cylinder Head Assembly CH350CA; Performance 170cc Cast Iron 64cc for 1996-2003 Chevy, GM K1500 Suburban (72-99), K2500 Suburban (72-99), P30 (72-99), C1500 (72-99), C1500 Suburban (72-99), C2500 Suburban (72-99), K1500 (72-99), K1500

EngineQuest Vortec Heads vs Factory castings

Ask Away! with Jeff Smith: How Much Power Can I Make By Adding Ported Vortec Heads to My SBC Engine?

Enginequest Hybrid Vortec Heads - Page 2 - Don Terrill's Speed-Talk

2 GM CHEVY 4.3 V6 262 VORTEC Heads Casting #140

SBC First-Gen Heads vs. Vortec Heads Reader Identification Guide