They do reduce lift at the expense of being noisy. Just like NON anto pump up lifters. I have used them and rather annoying. --- On Tue, 12/2/08, Dennis C. <dennis.2914@xxxxxxxxx> wrote: From: Dennis C. <dennis.2914@xxxxxxxxx> Subject: Rhoades Lifters - Questions To: 1962to1965mopars@xxxxxxxxxx Date: Tuesday, December 2, 2008, 1:32 PM I have a 383 that has more cam than I like. It is just a street car. I have been told about the Rhoades lifters that reduce lift at low RPM. http://www.rhoadslifters.com/Pages/index.html Is there any reason I should avoid them and consider changing the cam? The 383 is a 1963, Rhoades listes lifters for 1968 and later 383, I thought my 1963 and a 1968 should use the same lifters, am I correct? Thanks for any assistance. Dennis C. 1996 Dodge Ram 3500 Van Conversion 1964 Plymouth Belvedere 318 Auto 1963 Plymouth Sport Fury 383 4-speed 1949 Dodge Pickup 289/C4 soon to be changed 1998 Honda Valkyrie Standard ---- Please address private mail -- mail of interest to only one person -- directly to that person. I.e., send parts/car transactions and negotiations as well as other personal messages only to the intended recipient, not to the Clubhouse public address. This practice will protect your privacy, reduce the total volume of mail and fine tune the content signal to Mopar topic. Thanks! '62 to '65 Mopar Clubhouse Discussion Guidelines: http://www.1962to1965mopar.ornocar.org/mletiq.html. -- [Non-text portions of this message have been removed] ---- Please address private mail -- mail of interest to only one person -- directly to that person. I.e., send parts/car transactions and negotiations as well as other personal messages only to the intended recipient, not to the Clubhouse public address. This practice will protect your privacy, reduce the total volume of mail and fine tune the content signal to Mopar topic. Thanks! '62 to '65 Mopar Clubhouse Discussion Guidelines: http://www.1962to1965mopar.ornocar.org/mletiq.html.