1976 chevy el camino, first start, cammed 6.0 LS swap. 

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I can't remember exactly on the driveshaft. I had to use the yoke for the 6L90E trans and driveshaft and had the part that connects to the rear end for the El Camino mated together. I cut the trans tunnel across, and then cut on both sides up to the front and lifted it up. Then the back half of the tunnel had to come completely out for the driveshaft to fit. He then had new floor pans and the trans tunnel fabricated.