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Zero shrinkage so you can easily take port measurements at any given point. Not sure about making a mold of something. To remove it from the port you have to slice it behind the valve guide with a razor making a nice clean cut and then PULL it out the manifold face.

What razor do you use to reach down into the port for the slice? I started experimenting with this a couple of years ago. Have a port I poured that I had trouble removing the mold and I set it aside until I had more time for it. The razor may solve my issue.

I hope my leftover mold mix is still usable after sitting so long.




I have a long handle craft type razor blade that I usually use but I couldn't find it yesterday so I grabbed a regular new scraper razor blade and held it in my hand. It worked GREAT on this head but might have been tricky on a smaller bowl. Just try to make one clean cut so if you want or need to super glue it together you can. I also take a small screwdriver and work it between the head and mold all the way around the port. Did you spray it with mold release compound?

1970 Duster
Edelbrock headed 408
5.984@112.52
422 Indy headed small block
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