What's a typical drain on a battery while connected to a car?

[rickpaw]

My car is a 67 Firebird, with 5.3/4l60e swap. The vehicle wiring had been replaced with American Autowire classic update kit. Engine harness is from PSI wiring. Battery is located in the trunk.

The other day, I hooked up my meter in series to the battery neg post, and it read around 0.5A (everything was off). I pulled the relay for the PSI harness main fuse panel, and the reading dropped to 0.002A.

Wonder if these numbers are normal?