You'll have to work smart with it to improve. 352, big car, 3:00 rear. Small hydraulic roller, less than 220 @ .050 needed. Think about a RPM or a 428 CJ iron intake, OR a ported Ed Performer. Real good valve job and milling a good idea. The stroker using your block at 4.030 is a win-win. If you are going to freshen it, you should do the real good valve job and spend the porting money on the 352 stroker parts. Stroke will be your friend in a 3:00 geared cruiser.
Blair Patrick