Any tips for getting better bite into an allen head torque converter bolt?

My 4L60E had 8mm hex round head bolts attaching the torque converter to the flywheel. Any tips to get a better bite/seat for the socket to prevent rounding this fastener?

Dig all the dirt out of the bolt head, grind the worn end of your allan socket flat, beat socket into hole with hammer, use an extension so the torque you apply to the ratchet doesn't try to roll the tool out of the hole. If its already a bit damaged, put the ratchet right on the socket, and try to get a prybar on the back side of the ratchet to hold it in. If it still won't move, heat the head of the bolt cherry red, and let it cool just back to black, then hit it with the wrench.

Then buy regular bolts to replace them.

Also, if you use a snipe on the ratchet, you won't have to lean on it so hard, and can control angles better. Just watch the bolt closely to make sure you are not rounding anything.

For better bite, valve lapping compound. AKA Craftsman Grip Dr.

I don't think you can get the latter anymore.

https://www.harborfreight.com/air-tools/hammers/air-impact-hammer-kit-92037.html

Find a Torx that you can beat in there, then hit it with an impact.

There's a product called Drive Grip especially for this. I was quite surprised how well it works.

Edit: This stuff

Super glue works too sometimes

One idea that works in theory, would be to heat the Allen wrench tip up until it starts to get little Sparks. Then insert into the pre cleaned bolt head and hammer the exposed side of the wrench until it expands into the hex pattern more blacksmith style... Or you could just tack it with a welder (or solder if they are mild steel). Just make sure to use Craftsman or some other throw aways (like the free ones from Target furniture)

Also if the end of the allen wrench is worn grinding the tip off restores function

I like to heat stuck bolts and if they are stripped heat and vise grip them before welding tho. The teeth on the pliers bite better that way too.

Does the torque converter see trans fluid where these bolts are by any chance? If so that's better than off the shelf penetrating sprays.

Use your oldest ratchet or a longarm and hit the head hard with a large hammer as you apply force.

If you manage to strip one out gently dig an air chisel into the rim so you're pushing it counter clockwise, then go wide open on it, I've yet to have this not work for me on any fastener I've attacked that way. Just don't forget the eye and ear protection, those things are louder than they sound.