I've found a truck spares shop to be a good, cheap place to buy the deep socket ones for the ball joints. They normally have good stocks of the big sized ones

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Cheapest place I've found is VG Auto Paints in Girraween. They stock KC tools. I got a 35mm 6 point impact one there for $20.50. For my son's Jeep Cherokee hubs.
That's cheaper than any price I found on the web and no postage needed.

Deep sockets were not much dearer.

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

Lindsay at Minis Plus sells the deep socket impact type for $29.

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1998 Rover Mk VII
2001 Honda CBR 929RR (street)
2014 BMW S1000RR (track)

I now use a 3/4" drive socket. I found I was bending and breaking 1/2" drive breaker bars on some pinion nuts done up by gorillas with BIG rattle guns.

The 3/4 drive one can stand an 8ft scaffold pipe extension with me on the end of it.

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

that would be more than 1000 ft lbs.
Provided you weigh more than 57kg

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It's easy once you know how.