I don't think your at tdc on the compression stroke.
I would suggest ignoring the distributor, and front of the engine.
Pull all the plugs, plug #1 with your finger and crank it around until you feel pressure, then with a flashlight, and something non-marking, and combustable like a bamboo skewer, get the number one piston to the top of its stroke. #1 exhaust and intake valves will both be closed (or no pressure), and both lobes pointing up, ie 180deg from the contact with the rockers, which should both be loose (ie .006-.008 or so). Now see if your cam timing marks line up, and see what the top of the oil pump/dist drive looks like, and look at the front harmonic damper pulley to see if it has any marks that might be useful in the future.
If your dist drive looks exactly like the manual pictures, your distributor should fit. If not then you need to pull and reinstall the oil pump.
Michael