New to the forum so thanks for the add.

A little about me- Live in Austin and have only worked on new fuel injected motors.

I have recently purchased a Camaro with a blown 540 big block(with Holley DP 750's and B&M 871 Blower.) The car and motor have been sitting for the last three years in a non climate controlled storage unit. The car has only been started once in the last three year and this was 2 years ago. The car fired up but the carbs were leaking(from where I do not know I was not there.) The car was built and tested for around 2 hours before being put into storage.

My first steps-
Drain the fuel tank and lines
Check the oil for cleanliness and level
Pull the plugs and check those (not sure what I should be looking for here)
Put a bit of Marvel Mystery oil in cylinders and turn engine over by hand
Reinstall plugs and see if she will start

Any other tips on first start up?

After this I will decide if the Carbs need to be rebuilt or just a mounting gasket.