The Mental Pedals (Stainless ones) are taller then the RCR's. I think too tall (for me in an RCR) but hard to tell without a car in front of me. Have a look at BillD's build and I think you will see some photo's of how the tilton's fit and I think they and shorter as well. You can get the sizes from Mental with an email as well as the ones from tilton for comparison. One other thing to check out is which masters can they use. Most all here in the use use the tilton style not the AP style. BUT I think either can be used, just no one has confirmed it. Tilton also makes a crazy billet set, but they are about $2500 usd. Also Willwood looks to make an AP compatible master.
Sandy