On the 235 I had, there were only the 2 slotted flat head screws accessible thru the holes in the cam gear. I don't recall there being any hex bolts at all on the cam thrust plate. But if you're talking about the plate that goes on the engine block, yes, that has to be installed BEFORE the cam. The flat head screws for that get tightened then staked to keep them in place. I think 1/2" or maybe 3/4" would be correct for the hex bolts.


Kevin
1951 Chevy 3100 work truck
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1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car)
Busting rust since the mid-60's
If you're smart enough to take it apart, you darn well better be smart enough to put it back together.