Those o rings are only for prepped blocks. If you havent chamfered the block passage do not use the o rings.
The e curve is a trip . I had additional problems , my 305 tdc mark is at 12 o clock, but the balancer has a different indicator line. It is to the right of the keyway. The balancer is not separated from the outside just a mismatched replacement. The timing tab is also misplaced. On top of that the supercharger snout blocks the veiw from above. Talk about getting lost with timing.
In the end i spun the crank to tdc and back with a tdc indicator , then took the mid point as true tdc. Bent a coat hanger to use as a timing mark. Locked the e curve out and set the total, then dialed back. The e curve now starts with 5 and has 10 twisted in . That is 15 inital, and 20 more for 35 at 3000rpm. Somewhere in the powerband the btm retard starts pull 2 degrees for every 1 psi made.
Nice that is some strong rwhp numbers. You should be proud of that monster.