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400 sb heads with new style tbi manifold,help?

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by rjfguitar, Mar 10, 2003.

  1. rjfguitar

    rjfguitar 3/4 ton status GMOTM Winner

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    I built a bad 406 sb with the old style(classic) head design
    that was used up to 1986. I built it for my 85' k5 but I found a 91' for a good deal. How do I bolt on the tbi manifold when the bolts don't match because its for the E-tec style heads any conversions or adapters that anyone knows about? thanks! /forums/images/graemlins/confused.gif
     
  2. dyeager535

    dyeager535 1 ton status Premium Member

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    As I recall, the Etec heads are Vortec replacements...Vortec heads have raised intake ports that don't align with earlier intake ports.

    I'm sure you could make something fit, but misaligned ports are a bad thing.
     

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