[V8] Oil leak on header

[chris brown]

Well i have not driven the car more than 900 miles all summer. And After all that sitting i started her and drove it a hour o so and i;ve got a oil leak, a pretty good one too. Leaking onto the left header all the way in the back by the distributer.  It's causing a pretty good smoke too. 
 Ive heard i need to check three things. re torque dist mounts, heads, and valve covers.  
 Are these relatively easy things to do? Do i need any special tools? What LBS. do i torque these things to? 
 Planing on driving her a few hundred miles over the Labor day holiday and want to tighten these three things.   
 thanks.

 Chris  1990 V8