4v head specifications.

[IndyMerc]

Just picked up a set of DC heads, they have a 4 and not a 5 in the section.

hard to find detail on these as they are not the FRPP heads, but could be the 2nd last revision?

hoping to expand my knowledge on this subject.

[Ambitious1]

This may help you:

http://www.terminator-cobra.com/castings.htm

https://www.svtperformance.com/threads/confused-on-what-heads-i-have.869945/

https://www.svtperformance.com/threads/can-you-identify-your-block-and-heads-that-came-out-of-your-car.832382/