Trying to decide between a 1998 and a 1999 Cobra. Advantages and disadvantages. I know the 99 has C heads with swirl ports that flow better, along with a revised intake that has shorter equal length runners and the IRS rear. Whereas the 98 has B heads, the older intake, and an SRA rear. Any other things that would steer you towards one over the other? Obviously I know the 99 has 15hp more, but also weighs around 100lbs more so they usually perform fairly similar. Just curious to hear others input. Thanks.