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01-29-2011, 06:53 PM | #1 |
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Join Date: Mar 2010
Location: Spring, TX
Posts: 886
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Alignment issue with Edlebrock manifold on SBC w/ Vortec
We have an Edlebrock Performer manifold for a SBC 350 cid with Vortec heads. The manifold bolts have the correct threads for the Vortec heads, BUT the holes in the manifold are a bigger size, so the manifold can shift front-to-back a little.
Should we just center on the bolt holes or is there some trick to ensuring the airflow paths are smooth at the interface? It seems a little misalignment of intake manifold ports with intact head ports would be a VERY bad thing... Thanks. Mark |
01-30-2011, 11:50 AM | #2 |
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Join Date: May 2006
Location: Wyman, Kentucky
Posts: 403
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Re: Alignment issue with Edlebrock manifold on SBC w/ Vortec
You can use a pin punch with a 3/8" shank to align the intake to the bolt hole. Insert the pin punch through the intake hole and into the threaded hole on the head until the tapered end of the punch snugs up on the intake hole.
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1972 GMC Jimmy, 4WD, 454 CI, 350 Turbo, 4" lift, 35" tires The math teacher said my son "Bubba" could be a mathmatical genius. cause he's got 13 fingers! |
01-30-2011, 11:56 AM | #3 |
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Join Date: Sep 2007
Location: Vilseck Germany (currently)
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Re: Alignment issue with Edlebrock manifold on SBC w/ Vortec
Following Rusty Parts' advice, just make sure you cinch it down a little at a time, alternating the tightening, to ensure that it stays centered
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01-30-2011, 12:35 PM | #4 |
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Join Date: Mar 2010
Location: houston texas
Posts: 84
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Re: Alignment issue with Edlebrock manifold on SBC w/ Vortec
Thanks RustyParts and 70Custom10Nut. We also found out that Edlebrock has some special bolts...5/16 threads on bottom but 3/8 non-threaded shoulders. (Still not sure just why they would do something like this...interchangeability perhaps?) Thanks again.
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Mark 57 Austin Healey 3000 (sold many moons ago, unfortunately) 67 C10 (in progress, son's) w/ 1993 350 SBC, '96 Vortec heads (custom polished ports), EPS Performer intake, Holley carb, cam, MSD ignition 93 C4 Corvette (mostly done, son's) |
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350 chevy small block, alignment, edlebrock, intake, vortec |
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