The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - What Header for a '71 GMC 4X4 3/4 ton 350 V8 4 speed Fits/Works best?

Mike C · 05-21-2002, 03:42 PM

When I put headers on the JImmy, Heddman was the only one that fit without modifying clutch linkage. Someone else had problems but they may have had a big block. My recommendation is the 2 1/2" Corvette Rams Horns. I 86-ed my headers for the manifolds, 2 1/2" aluminized exhaust and Dynomax Hemi Turbo Mufflers. Not only does it feel just as powerful as the headers and 2 1/4" exhaust, it is QUIET and leak free. Speak softly and carry a big stick...

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70 GMC 3/4 ton Sierra Grande 402/TH400
72 Jimmy 4WD 4spd 4" & 35's
64 Corvette Coupe
68 Camaro 'vert TPI & TH700
69 Z/28 355 12.6's @110
72 Datsun 240Z-ol' reliable

05-21-2002, 03:42 PM	#2
Mike C Registered User Join Date: Dec 1999 Location: Austin, TX, USA Posts: 7,739	When I put headers on the JImmy, Heddman was the only one that fit without modifying clutch linkage. Someone else had problems but they may have had a big block. My recommendation is the 2 1/2" Corvette Rams Horns. I 86-ed my headers for the manifolds, 2 1/2" aluminized exhaust and Dynomax Hemi Turbo Mufflers. Not only does it feel just as powerful as the headers and 2 1/4" exhaust, it is QUIET and leak free. Speak softly and carry a big stick... ------------------ 70 GMC 3/4 ton Sierra Grande 402/TH400 72 Jimmy 4WD 4spd 4" & 35's 64 Corvette Coupe 68 Camaro 'vert TPI & TH700 69 Z/28 355 12.6's @110 72 Datsun 240Z-ol' reliable __________________ 44 Willys MB 52 M38A1 64 Corvette Coupe 68 Camaro 'vert LT1 & TH700 69 Z/28 355 12.6's @110 69 Chevy Short Step 4 1/2"/7" drop 72 Jimmy 4WD 4spd 4" & 35's 02 GMC 2500HD 4x4 Duramax