Compression test only at 90 psi max, timing chain off?

Are you checking for spark from the coil wire, or the spark plug wires? Could be a chance its not making it to the spark plugs.

Here's another good one to check, because I had Spark & Fuel on my '74 Duster the last time I dropped the engine in the car (after more upgrades and a new Accel 300+ Ignition System). Like I said, it had Spark & Fuel but I couldn't get the engine to fire no matter what, not even a sputter.

My dad walked over, looked under the hood and immediately pulled the spark tester off, slapped a spark plug in and set it on the intake and told me to hit the key. No Spark with a Spark Plug (but it showed up great on the tester). He laughed and said "Your ignition box isn't getting a good ground." Sure enough, I changed the Ground Wire from the Body (Where the Accel Instructions told me to put it) to the Battery and the engine fired right up at the tap of a key.