[ERANJ]

Based upon the feedback from the hands-on technical experts in terms of reliability, quality and power output an iron block is preferred. From my personal experience FEs are temperamental enough without adding another variable to the equation.

It also depends on the type of build you’re seeking and Cobra manufacture. For some of the replicas I feel an aluminum block is probably the easiest and best path forward provided the cost is not a concern. For builds where the purpose of an old school is the intention I can see a cast iron block is preferred.

So to say an aluminum block is more desirable for resale or worth more depends on the particular car IMO. Everyone has their preference/opinion but would not make an overall claim about aluminum.