65 HiPo dual point Dwell

[mygt350]

65 HiPo 289 dual point distributor. Am told total dwell is 30-33 degrees. To get to 30-33 degrees total, primary points are set to 27 degrees dwell while secondary points are blocked off. When 27 degrees dwell is obtained on primary points, remove block from secondary points then adjust secondary points to get to the 30-33 degrees total.
Are the above dwell numbers accurate?
Looking at the dizzy pointer, shaft rotates counter clockwise. Primary points are the ones that open just before the other pair. If correct, the primary points are at the end of the strap connected to the other points and the condenser just before lead exits dizzy case.
Any comments/corrections most welcome.
Martin228

[Dizzy]

In real life you will find each point set will be close to 22 degrees dwell ,and the TOTAL dwell will be close to the 29-33 spec. Strive for an EQUAL dwell on each and a total close to 30. Easy on a distributor tester,but time consuming otherwise. Good/CLEAN contacts are most important.