...while a very subjective question it is a valid one. In my case, 'nice power' will be whatever the original LA 318 had here at 7000 ft altitude: it had 360 heads, a "4bbl" cam with a nice mild lope, and I don't know if it had 318 or 340 manifolds...but it was just a nice warm 318 and sprinted happily to around ~5500 rpm - nothing fancy. I've no idea what the hp was but it was 'plenty'. I can only presume a similar magnum 318 with a similar cam will run just as well, and that will be plenty for me.
A magnum with similar cam will make quite a bit more power, it will get more valve lift, the heads flow better, lot more compression and at 7000 foot elevation that compression is everything.
