Converting a 4150 intake to a 4500

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Converting a 4150 intake to a 4500 Empty Converting a 4150 intake to a 4500

Post  BigBlockRanger on November 19th 2012, 10:20 am

Modified the intake on Saturday to accept a 4500. Did it in my driveway so I thought I'd throw it up here to show how easy it is.

4500 gasket on the 4150 flange.
Converting a 4150 intake to a 4500 486202_10151244245104485_1040868097_n

Sharpie'd an outline around the gasket.
Converting a 4150 intake to a 4500 63835_10151244245299485_433905673_n

Drilled holes along the lines I wanted to cut and took a ball peen and tapped the big chunks out. The casting is really thin where the clovers are because this intake is available in both flanges. If I were doing it again, I'd drill smaller holes along the perimeter so I would have less material to remove with the carbide.
Converting a 4150 intake to a 4500 178919_10151244245714485_1754667938_n

I countersunk the alumimum screws, then drilled and tapped the new stud holes. The new holes actually go through the heads of the filler screws.
Converting a 4150 intake to a 4500 74786_10151244246189485_32767848_n

Finished. I also drilled and tapped a vacuum port in the back because this manifold did not have a vacuum port.
Converting a 4150 intake to a 4500 579216_10151244246864485_1498888554_n
Converting a 4150 intake to a 4500 532344_10151246621649485_1231885434_n

Intake gaskets will be here today and I maybe I can find some time soon to button it all back up.


Last edited by BigBlockRanger on November 19th 2012, 3:26 pm; edited 1 time in total
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Post  rmcomprandy on November 19th 2012, 11:45 am

If you intend to ever use any "plate" nitrous system then remove the front and rear sections of the "cloverleaf" so, it is straight across in the front and rear.

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Post  BigBlockRanger on November 19th 2012, 2:27 pm

Thanks for the tip!
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Post  jbozzelle on November 21st 2012, 1:20 pm

Easy enough!

Any special tools? Drill press?

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Post  BigBlockRanger on November 21st 2012, 2:25 pm

Nope. I used a block of steel with a hole drilled in it as a dill guide and drilled it with my 1/2" hand drill. Drilled, tapped, done.
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Post  Mike R on November 22nd 2012, 12:39 am

Nice job. Thanks for posting the pics, it's going to make it easier for me when I do mine.

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Post  alkymark8 on November 23rd 2012, 7:57 pm

Thanks! I am going the other way with my intake. Where did you get the alum screws???

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Post  BigBlockRanger on November 24th 2012, 8:47 pm

I ordered them from Mcmaster Carr.
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