What would the cranking compression be for a new stock LT1? How about a LT1 with 150K, what is average compression?

I have a 94 Formula with just under 70K on it and I had about 180 on all cylinders.
I have a 91 TBI 5.0 Firebird with 137K on it and it had about 200 on all cylinders.

I also have a 96 Caprice that has about 180 on all cylinders, but the mileage is unknown and the transmission is shot which leads me to believe it has around 150K.

I'm trying to figure out if 180 is decent for 70K.

 

i think it should be around 185-200 for a new LT1. So it looks like your motor is in pretty good shape.