Is there an easy way to find TDC for 1 on a Chevy 350 with out pulling the timing cover and no timing tab?

There are several ways to find TDC, but the easiest and most accurate I have found short of a dial indicator requires nothing more than an old spark plug, clear plastic tube, and a clear jar filled with water. It is made up of a simple fitting from an old spark plug housing, attached clear tubing and run it into a jar of water. Bubbles will come out on compression, stop at TDC and start sucking up water immediately after TDC. Work the crank back and forth slightly a couple times to get accurately centered. It is easy to see the water level position inside the small tubing. This method is very simple and very accurate. Make sure to remove all spark plugs and spray some oil in each cylinder. This will make the engine very easy to turn by hand.

OR remove #1 spark plug and slip a small device of some sort into hole and rotate motor by hand while feeling for piston to come up. once you feel the piston keep going until it stops traveling up. NOTE. the motor MUST be turned by hand. If you crank with starter it could break off what you are using to feel with.

once you establish positive TDC mark it on timing cover and balancer so you know where it is later.