Pre-Start Concerns... Gen 5 sat dormant for 3+ years

[cornerstone]

I want to focus on firing up my Gen 5 L83. I bought the low mile motor and 6L80e about 3 years ago. I've basically done nothing to the internals or fuel system on the engine. Only test fitting it to my frame and built mounts, etc. I think I have everything needed to go forward but I'm concerned about a few things. These 3 come to mind, but I'm sure I will have more questions.

1. These Gev 5's are direct injection, and have a mechanically driven high pressure fuel pump mounted on the top, in back of the intake manifold. Do y'all think I should do any cleaning of the fuel system? I have heard of injectors sticking when an engine sits for a long time. Maybe clean out the fuel rails?

2. Prime the motor with oil pressure?

3. Throttle body clean out?

Any and all advise will be appreciated.
-Brian