I'm putting a 1967 24' cuddy cabin back together after I epoxied in a new transom in and reinforced the two main existing stringers w/ 3 additional layers of 1708. I had some left over material and am putting in an additional set of stringers. The boat already had 2x2's glassed into the strakes ( they're the outer strakes - ~ 10" from the chine); and I'm just adding on top of these to bring them up to the sole.
Here's the thing:
The port side stringer is custom fit and pretty much the same dimension over it's 13' span (5.25" +/- .25"). The starboard side, which is also custom fit, however, is not.

It's 5.25" front and back; but it tapers down to a low point of 6.25" at 8' from the transom. I've checked this every which way - and yep - it's the shape of the hull. The chines are straight as are all the other strakes - it's just the one strake that this stringer sits over.
How bad is this, and what would this mean for performance issues? I just finished rebuilding a Ford 351w est. 285 HP; so it's not high performance - but I'd like to see 40 knts. I'm putting the boat on blocks this Fall to sand and repaint the bottom - Is there anything I could do to while I'm down there? I wish I found this earlier, I may have reconsidered the project.