Back in 1968, I worked at Chrysler Trenton Engine plant. I machined the cylinder heads for the 426 hemi among other jobs. Also hemi rods and bearing caps. We did not assemble those engines, just shipped the parts to another facility. I used to stop on the way in to look at the warranty return engines sitting on flat cars (Looked like the small trains you see pulling luggage at the airport tarmac.) Rods sticking out the sides of the block etc. Almost all were hi-po 383-440 and small blocks. I would have loved to hear the explanation for the carnage. "I was just warming it up in the driveway and it blew up" At a car show a couple of years ago I saw a 68 Barracuda sponsored by the old Gratiot Auto Supply. It had a hemi with cast iron heads on it and I woundered it they were some of the ones I had done. Fun times.