Yes, Yes, and No. At least in my case.
After installing the correct springs, after preparing the heads properly in the area under the shims, after fixing the problem with the guides that was side-loading the pushrods, and after I don't remember what else, I haven't bent one since.
Somewhat not surprisingly, despite DeTomaso's diagnosis of leaky headers bending my pushrods, their repair did nothing to help the problem...
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