I called mec customer service. The 8567 Grabber 410 column and actuator are the same parts used on 12 and 20 gauge 2 3/4" & 3" machines. The column bolt should be in the bottom hole and bottom base hole for 2 1/2" 410. The actuator bolt should be in the top hole.
The 8567 410 machine is factory set up for 2 1/2". There is no 3" kit or column adjustment for the 410 8567 Grabber. The mec 650 has a 3" kit for 410 which is available from mec.
...I will look for a good sizemaster single stage reloader for 3" 410.