Image courtesy of nicksgarage.com

Now.... I have the performer (not rpm) on my '69 N96 equipped 383 SBee. The performer is pretty close to stock height. The height of the RPM is 1.35" taller than the performer. The height of the RB air cleaner base is 1" lower than that of the 383. So, if you use the RPM with the RB air cleaner base, it is .35" taller than that of the stock configuration. Hope this helped more than hindered.