That particular factory stood semi idle for nearly a decade, and stood well in rank to showpiece Union's engineering like Moscow metro. It's nearly certain that the original factory built Albert Kahn only managed to make a few thousand units before accidents, a fire, breakdowns, and complete inadequacy of the fitting necessitated a complete rebuild (at the time, it was said to be "random, wrong, and sometimes completely unneeded equipment")
It was rebuilt, expanded, and retooled multiple times before they can manufacture even a "tin can" (as was called by Union's soldiers) T-26 tank.
And yes, the story of T-34 going to frontlines right from the assembly lines is a gross exaggeration.
No Americans had much of a role in USSR's alleged industrial proves on the eve, and during WW2 aside from Lend-lease, it was the fantastic, enormous resource expenditure which did.
The country remained largely agricultural until mid-late seventies.
I'm sure they sucked and suffered from the typical incentive misalignment of ever other planned economy but the GP's point that the initial soviet industry was done with the help of foriegn specialists setting up domestic production of forign goods is very true.
