building a mild Daily driver 318
There are so many ways to go about it that it is very hard to make basic recommendations.
Do a lot of research on here and web searches. There are some magazine builds that attack the mild/moderate 318 builds from different angles.
Basically you will probably want more compression, and upgrade the heads. Either by porting or replacing. Valve size upgrade may not be necessary for the low end of you scale, but may for the high end.
I had a decent running 318 with a cam, headers, change to later model "302" casting heads, 4 barrel intake and carb. Not sure on the HP(Guess: 220 at the wheels) since I never ran it at the strip or dyno and tore it down a while ago because of a crankshaft issue.
I am now rebuilding with higher compression and I am keeping the 302 heads(for now) but upgrading to 1.88 and 1.6 valves. I will put up a build thread when things are closer and will eventually have track times with the new combo ;)