I would suggest getting engine paint from your local car store. I don't know much about that home depot stuff, but I know that the Dupli-Color engine paint goes on very well, settles out any runs, handles the temp perfectly, and gets hard as nails after a heat cycle. Just make sure you buy the corresponding primer.
Another suggestion: use hemostats with a piece of scrubby wash cloth clamped in the end to really scrub away the stubborn paint in hard to reach areas after applying your paint stripper. That way you'll get a great finish and good paint adhesion. The worst thing you can do for your paint job is to leave any specs of old paint on there.
Also, bake your side covers in your over at 250F for about 20 minutes after painting. Put them on top of wax paper on top of a cooking pan. Let them cool thoroughly before handling them though, as the paint will be soft after coming out of the oven. Like I said though, hard as nails after it cools.
Tried, tested, and true method to pure, painted engine, nirvana.
Camelman