Engine won't start after intake manifold change.

[jklonowski]

Changed the intake manifold and out everything back together and the engine won't start. It keeps backfiring. Before I took the distributor out I put # 1 and tdc and marked were the cap was positioned. When I dropped it back in i lined the rotor back in at the #1 spot and I never let the dist turn after I took it out. But idk it's the first time I've dug that far into an engine. I just couldn't understand how it could be the distributor out 180 but who knows. Any ideas on were to start looking for the problem. Thanks a lot.
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