40,000 to maybe possibly as old as 70,000 year old drill and stone work. The hole was drilled rapidly with little to no bit deflection, almost as if they used some sort of drilling machine.
https://youtu.be/kKEGouqTQ5Y
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1984 chevy suburban, custom made 6.5L diesel turbocharged with a Garrett T76 and Holset HE351VE, 22:1 compression 13psi of intercooled boost.
1989 firebird mostly stock. Aside from the 6-speed manual trans, corvette gen 5 front brakes, 1LE drive shaft, 4th Gen disc brake fbody rear end.
2011 leaf SL, white, portable 240v CHAdeMO, trailer hitch, new batt as of 2014.
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