5.7L Vortec vs Pre-Vortec Height Dimension?

[Brentathon]

Does anyone know how much higher the Vortec 5.7L is versus the pre-vortec GM 5.7 1988-1995 (s/n 0F_____ thru 0F_____)?
I’m looking to replace my pre-Vortec, and would consider a Vortec if it would fit (under the deck engine cover).

 

[Meames1]

Edit: Nevermind, I listed wrong years.

 

[Rick Stephens]

Only difference possible would be dependent on what intake manifold and carburetor. Otherwise the motors are the same.

 

[Brentathon]

Yes.... that’s exactly what I’m looking for.... the difference going from my Rochester Quadrajet 4-barrel to the Vortec (higher intake manifold?) and I believe they use a 2-barrel..?

 

[Rick Stephens]

Yes.... that’s exactly what I’m looking for.... the difference going from my Rochester Quadrajet 4-barrel to the Vortec (higher intake manifold?) and I believe they use a 2-barrel..?

It is easy to find Vortec drawings.... but any assumption as to which intake and which carburetor is dependent on what you choose, they have several models, 2 BBL, 4BBL, and EFI.

You can find dimensional drawings of everything except pre-vortec here.

 

[Scott Danforth]

if you put a 1995 or earlier SBC next to a 1996 or later SBC (vortec headed) and measured the data points, they would be the same.

now depending if you buy a low rise manifold, medium rise manifold, high-rise manifold or use a spacer, that may change the height of your spark arrestor. however assume both are stock supplied motors with 4-barrels, the top of the carb opening is in the identical location on both.