Originally this 406ci SBC came with a 650 Holley and a Edelbrock Performer dual plane intake. Pretty restrictive if you ask me. I ended up installing a Holley 830 and it was time for the intake to be replaced. Here’s a few pics of that process.
Initially, the dual plane intake just looks ugly because its dirty. Performance wise, a 406 will make a little more HP with a single plane intake. I cleaned up and painted the Victor Jr a high-temp silver.
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After removing the distributor, alternator bracket, carb and various things that were in the way…time to remove the old intake gasket and seals. To keep trash out of the valley I just used some shop rags and vacuumed out whatever slipped past the shop rag.
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After installing the intake gaskets which are being held in place with a small dab of blue sealant, its time to seal the front and rear where the intake will rest. Dont want any oil leaks. Oh..and the 2 cork gaskets you get with your gasket set, throw them away. On all 4 corners where the head meets the block, make sure you get sealant there also. I’ve seen a simple job like this turn messy because of a pinhole leak in those areas.
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These two..just go ahead and throw them away.
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Carefully line up the intake and place it on the engine. This pic shows my distributor installed. Didnt take a pic of the intake being installed. Torque specs are 25# and pattern in the next image and in addition to this I used a little bit of thread sealer on the ARP bolts to make sure we dont have anything leaking past the bolts.
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