1970 340 engine

That's actually a 1971 year engine... 1/7/1970 was the middle of the 1971 model year.... (It starts in July...)

Is it standard bore??? Overbore??? Crank cut??? Compression??? cam specs??? What brand of parts were installed during the rebuild??? Any video of it running???
I have never had engine apart but it has great compression when you turn it over by hand, it pushes wrench backwards when it comes up on compression!