When I did mine in my 72 K5 I used a Harbor Freight Port-A-Power hydraulic ram to lift the front of the engine. My floor jack did the rolling/kick out thing too. I removed the dizzy, but found that my headers just started hitting the firewall when the oil pan was close to coming out. I ended up lust giving the port-a-power two more pumps, and that pan came out.
Before re-assembly, I reshaped the oil pan slightly with a ball-peen hammer to help it clear the cross member better, and allow me to drop and reinstall it without having to shove the engine through the firewall. It is a minor change, like 1/8 inch depression in pan where the cross member hits it. Man what a difference!
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