Valve lift question

Very interesting. I'm not an engineer but I get really excited about engine dynamics. I have loads of engines under my belt (Subaru, SBC, rotary's, 2 and 4 stroke motorcycle engines) but this is my first mopar. I like learning about and overcoming design flaws as well as exploiting their strengths. The FABO archives have been a pretty serious wealth of info.
What valve lift are you trying to achieve? The 1.65 rockers you have will get you very close to 1.6 lift numbers. I'd try them before sending them back.