360 Engine cranks but won't start

Well you were either at top dead center intake stoke or top dead center exhaust stroke. For giggles you could remove your distributor and turn the rotor 180 deg and put it back in, or pull the valve cover and watch the valves move to determine what stroke your on. Once you are at TDC intake, install the distributor and wire the plug wires where ever #1 lands on the rotor/distributor location and yes pull the TDC tool and install your plug and wire. Do not crank it back words.

I hope you didn't try and start it with the TDC tool in. If so you may now have a bigger problem.