Sarting engine for the first time

[Windsor Schmidt]

Ok, now things never seem to work right for me the first time around (I'm sure I'm not alone here), but it looks like I'm ready to start up my car for the first time in 3 years. I've got a freshly rebuilt engine (w/ total-seal rings), and a haltech E6K engine management computer (hopefully set up correctly), with a fuel/ignition map that's good enough to get going with.   The guy at total-seal basically said, not to be afraid of putting the engine under load, and to 'load cycle' the engine (speed up, slow down, speed up, slow down...), just not to rev it high for very long, and don't lug it... All of that makes sense, but if anybody has any tips, please send them my way! =)   I'm assuming I'll have to fine-tune the timing once I get the engine to idle (at cranking speed the spark is less stable, a computer rounding error I guess?)... Now, the total-seal guy said that the first 20 miles is the most critical in terms of seating the rings against the cylinder wall.   Should I be worried about sitting the car in my driveway, starting and idling the engine, while getting my base timing correct? How much time do I have?   Thanks very much,   -Windsor