pfilean, I half expected tearing around the bolt hole as I attempted to flatten it on the inside down to the cover flange. That's what convinced me I should stop.
I found these bolts and ordered them.
https://www.ebay.com/itm/64-79-Ram-A....c100009.m1982
They are from Inline Tube and advertised here as 11/16" long. At the Inline Tube site however, they are described as 21/32" long. That's a big difference so I'm hoping they will be long enough even though they may only be 3/32" longer than the one's I've got vs. the gasket being 1/8" thicker.
I am a bit worried that the bolt on the RH cover that passes thru the oil dipstick tube tab will really need the extra 1/32" length. But I'll cross that bridge when the time comes.
The '65 Shop Manual shows 65 in-lbs. +/- 15 so I have my 1/4" drive torque wrench ready to torque them properly.