Mark,
when i first started dealing with nova, before they changed the marine to Top,
the timings where alot better in 35plus, eh 190, trans 130 etc,
these made good power and rev's, was running h7's and 1450's with 3.7 cup etc
when they changed to Top, timings changed (was'nt told)exh 195, trans 135 etc,
they lost all the power but top rpm's was crazy,
i was running pipe under 7in turning a little 1445 3.2in cup and running around 73mph,
rev's were nothing like had ever heard before,
Nova ozspec flash 21 have timings to suit my set ups,
exh high 180's trans high 120's etc, it has a newer design piston/sleeve...
this make's good power and awesome rpm's i'm running high 70mph with this set up,
i do agree that lowering 35plus 21 sleeve is better,
Mark, i find the turbo plug head to better...
thanks
regards Aaron