No, there is a standard LH model and a separate RH model of Delco Voyager EST kits. The RH is about $100 more as I recall . Some say the difference is only the direction the bevel gear is cut at the bottom of the shaft for the oil pump , but I can't confirm that and preferred to get what the mfg offered for that RH engine.
I had both LH and RH ones installed on my previous set of I/Bs and they were superb. Much better than the Delco's on my newer blue MPI engines.
My winter yard installed the Voyager kits which were very highly recommended by Crusader, so I can't advise as to any installation particulars for those.
Obviously these kits won't solve a problem which is not distributor/coil/cable related, but it sounds like you feel you have eliminated most all other suspects. They would still be a good upgrade anyway , just judging from my having had them for ~~10 yrs.