Sounds like a timing issue, you might have to check all the timing components, recheck everything to see if you are off by a bit, check the timing chain vs the old one, check the install procedure. Also check the firing order, it sometimes is very easy to mix up two wires. Now you say you did not touch the distributor, it is possible that the timing was messed up before you got it, and installing the new chain in the correct position now means the distributor is now out.
Also do you hear any vacuum leaks at the intake?
Start from scratch and double check everything!
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