Engine removed timming chain put back a new one now i lost power?

Actually as of today,I knocked off 31 and 63 codes but then I got 96. The engine has been shaking like it wants to turn off. Don’t have a fuel gauge on it, I’ll get it see what’s the fuel pressure. New bbk FP ,so I’m assuming a bad fuel regulator might be it. It looks really old. Not sure if a bad reg could set off a 96 code
Maybe when you learn how to spell timing, your engine will magically start running better…
 
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If the shaking was not there before the 'tare down' you have the plug wires crossed or something connected/installed wrong.
You need to buy a repair manual.
And check basics, starting with firing order. And compression test.