I am in the process of replacing all the top end gaskets in an attempt to stifle a wandering idle and stalling issue, when taking the intake base off some coolant spilled into the lifter valley. Not a lot but enough to warrant making a post about it! I'm assuming that I now need to change my oil, correct?

 

You'll be doing that regardless of the coolant so that'll take care of it.

 

I should clarify that I meant intake manifold gaskets not top end. Will I need to do some sort of a "flush" or will a regular change do the trick?

 

Clean up the coolant in the valley. Then just do a oil change.
Coolant can destroy bearing!