The buildup starts with Lunati's 406-inch Super Bracket kit, which is based on a production 400 small-block Chevy block-and-crank combination with a,030-over-bore to get the extra 6 cubic inches.

For this tutorial I am creating a 6 inch block. So the instructions will be using the measurements for that. Below are listed measurements for different block sizes.

Starting with a 460-inch big-block Ford, the bores were knocked out to 4.440 inches, and a 4.300-inch forged Eagle crank along with their matching 6.800-inch rods mated to a set of Mahle pistons ...

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