As far as PE I would have no issues using one of his engines and is a stand up guy.
I feel the majority of issues with cobras and their associated engines, regardless of the engine builder or manufacturer is for all practical purposes Cobra's are junk when compared to your dailey drive which goes 100K miles with cold ac and never a drop of
oil on the garage floor. Cobra's are piddler cars which must be handled with cotton gloves and constantly massaged. Sure you will smoke anything from zero to 100 just don't race them for 1K miles, some cars run marathons other sprint. If one does not have at least shade tree mechanic skills do yourself a favor and get a vette, porshe etc.
Let the flames begin