Repeating from post #4 - and you will need to go in this order....for example, you cannot check the ignition timing using #1 cylinder if there's no spark in the #1 wire due to a problem in any of the first 3 steps here:
Check that you did not install an even-fire distr. cap* (assuming that's even possible).
Check that the distributor is installed correctly per M:01:02 in Workshop Manual based off of TDC for #1. That is critical - assume nothing.
Check that #1 plug wire is on #1 TDC plug tower.
Check that the ign. timing is really set to #1 cylinder (rt front).
We know the distributor was replaced (but the replacement indexing accuracy is unknown so far) and we know there is no spark in the right bank. Spark may be generated for that bank but due to the odd-fire setup the spark could go nowhere if the rotor-cap sync is incorrect (off by one phase either way).
Especially note that when the distributor goes back in the spiral gear can affect the final rotor position/indexing.