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I'm sure much has been written regarding flow, chamber size, open vs closed chamber, port design, valve sizes, response(s) to basic porting, valve or spark shrouding, etc...but for us new guys maybe you could tell us why you think one is as good as the other and if there are some differences to be aware of. Knowledge is power...
the D3VE heads are basically the same as your D9TE heads. The D3 heads were used up until 79-80, Ideally you should try to find a set of C8VE C9VE or D0VE heads.
The D0OE heads are the cobra jet heads. D2OE and the D3AE heads are the Police Interceptor heads similar to Cobra Jet.
Avoid the D2VE heads they had the largest combustion chamber and were fully open with no quench area and tend to detonate.
429 Boss C9AE-A and D0AE-AA,
302 Boss C9ZE, D0ZE and D1ZE,
351 Boss D1AE-GA Same casting number as the Closed quench chamber 4v heads butmachined for push rod guide plates and valve spring seats/cups