I'm quite happy about the engine overall, it kicks a$$ getting on plane like never before, but was half expecting to gain a little more top end. I typically cruise at 3500 RPM which nets a comfortable 26 MPH.

Here's exactly what I did to this thing:
.030 oversize bore
Probe FRS forged 22cc dish pistons
CAT 5.7" 5140 Forged I-Beam Steel Rods
CAT 4340 Forged stroker crank (a fluke, I ordered a 5140)
Clevite 77 stock size bearings all around
SFI 6.75" damper and 168 T Flywheel
(all above balanced to +/- 1/2 Gram)
Total Seal Moly Rings (prefit)
Edlebrock 2104 Performer intake (and gasket matched)
Comp Cams 12-236-8 Extreme Marine Hyd Cam (installed "straight-up" which already has +4 Deg. advance)
Comp Cams Hyd lifters
Goodwrench 1.5:1 rocker arms
Hardened Pushrods
Dual Roller timing set with cam button
Melling HV oil pump (80 psi)
Arp HSS oil pump driveshaft
Stock 64cc heads ported, gasket matched, mirror polished combustion chambers/exhaust ports.
3 angle valve job
Distributor was re-springed and curved to 14-15 deg. & all in at 2500 RPM