Start with the power chain. Since nothing works check the battery. Pay careful attention to corrosion under the connectors and loose wires going into the connectors. Check for loose wires at the starter as well. If Most likely its a bad power connection.
1967
400 RPMs is sufficient, but it can start with as little as about 200.
Weak battery, starter solenoid, or starter.
thats a nice car
Sounds like an exhaust leak.
I would start by changing the thermostat. They go out, often, or have a tenacy to stick, and are cheap.
yes.
Not really. The sure tell is to pull the pan and start taking off rod and main caps.
Could be several things, however, it is probably an exhaust leak, or in the valve trane. I would start by checking the oil, however, as this is a warning sign, of it being low.
It would bolt in, however, that entire vehicle is run by computer, and would not even start, without completely rewiring it, even if you could get by the smog laws you would be breaking by doing this.
As far as I know GM did not start using gov's., until mid 2000, with the new motors. It is part of the computer.
Yes the engine turns clockwise. Start at #1 on the cap and wire it clockwise. 1-8-4-3-6-5-7-2