[66sprint6]

I replaced the cam on our old 400 motor. I also replaced the timing chain. Now the engine won't start. It spudders and spits, and backfires like crazy while spinning the starter.. Makes me believe that the timing is out 180*.
When installing the timing chain, I set the engine to TDC. I put the timing chain on with the dot on the crank sprocket at 12:00, and the cam sprocket at 6:00. So I screwed up by trying to start it with the distributor set to the number 1 position.
So now what do I do? I thought that TDC was only one position, but are #1 and #6 exactly the same at TDC? If the #6 cylinder is approaching TDC, then would I still feel the pressure with my finger on the hole on the #1 cylinder? This has got me stumped. I've got to line it all up again.