They're neat/impressive motors but too big for the Cobra IMHO. Too heavy too. Fast in a straight line but if you think a BB has a disadvantage vis a vis a SB in handling then its two fold for the SOHC.
Besides its not historically correct.
They have a Wow! factor for those seeking peoples choice at the Mom and Pop car show but I wouldn't want one in a Shelby, but hey when has anyone here agreed with me anyway.
Takes care.