1954 Plymouth Savoy Won't run ri

[Adventuredude]

Just pulled the 6 out of the newly purchased 1954 Plymouth Savoy and replaced the main seal. The car is now difficult to start and when finally runs it sputters doesnt rev up exc then dies .What could be wrong typically after pulling the motor and putting it back in

[kencombs]

I'd look first at timing and distributor cap.  Real easy to bump and move the first and crack the second while installing an engine.  DAMHIKT

 

Next would be look for unconnected vacuum lines.

 

Then check fuel delivery, line sucking air at the pump?

[belvedere]

I’m thinking along the same lines as Ken. Hard starting and won’t rev could sure be timing and/or weak spark.

[Dan Hiebert]

Ditto above, with addition to ensure good grounds for electrical.