Im working on building a mild driver 292 for my ranchero 4 speed 3.50 rear end manual everything. its mostly show but does do long trips. planning a 292 g heads mild port work, some form of longer tube headers 1 1/2 or 1 5/8, around 9:1 compression on e10. ive read a number of posts about y blocks, not needing extra exhaust duration, more lift less duration. i prefer a nice slow lopey idle over maximizing performance. i was looking at Oregon cams and have a few interesting ones that i believe could be decent choices. 
  #   .050 duration  LSA   lift                 overlap.020    dcr
791    230 230     108   .322 .326            52            7.51
34      250 250     107   .329 .329            74            7.08
807    222 222     109   .284 .284            52            7.34
346    234 228     106   .317 .319            45            7.75

How wrong was i in looking for a cam. #346 seems like a solid cam choice especially for lower mid performance, but would that cause super low rpm window? Does dynamic compression effect rpm window, would raising it on #34 improve performance of it while keeping in on 87 octane? for a lopey idle is it only the overlap that makes a difference or can less overlap on a narrower LSA have same idle as larger overlap on a wider angle. any suggestions where i can learn more, any free programs that would let me better compare these and their effects, other cams companies, grinds, or suggestions. 

Thanks
Seth