Researching the Timing Plate Mods some more:
I got the Stovebelt tech guide and the template, also found this engine build tech guide -
https://www.chevydiy.com/how-to-assemble-a-chevy-inline-6-engine-after-rebuild/;
There is some perhaps contradictory info between the two;
in the latter guide it says for the Timing plate installation ....
Put the two front engine-mount bolts through the holes. You do not want to install the timing cover and then decide you should have put the bolts in first because one of them (especially) does not go in the hole after the cover is installed.
From the tech guide and advice earlier, it suggests to insert the bolts in with the balancer removed (while also replacing the seal in the cover) i.e.
NOT with the cover removed, just the balancer
(See the first image attached which follows this counsel where they have put the bolts in while installing the plate)
I trust my learned 'Bolters here so I presume the Bolts
will go in without having to remove the timing cover?
(I did learn something here - earlier I had perceived it was the PLATE that was bolted from the inside, appears it is the COVER)
The other question is regarding the hole mod for the timing plate:
The drawing suggest 1/2" hole - the bolts I understand are 7/16" carriage - so I presume the 1/2" holes reflect clearance for the square 'carriage' section
So ideally I should really drill
7/16" holes and file square if I want the anti-rotation capability of the carriage - yes?
It must be hard otherwise if you use a carriage bolt - or do you use a regular hex bolt and get a wrench on it BEFORE installing the Balancer (in which case, why not still 7/16" hole?)
