A lot,....of Superformance come out of the factory with the 365 series, most are 460's.
I don't plan on ever selling my Cobra, unless my health gets worse, but if I do mine will sell better as a FE will be in the car. The 351 engine is very popular, but even they won't bring the money. If that doesn't matter, put in a Hemi or a twin turbo Diesel to be different ! lol
(Ron, I'm going to send you a message about your 8 stack)