I am putting a new set of Trick Flow power port 270 heads on my 500 CI RB and need to have someone spec a cam for me. I bought a used one and it doesn't seem to fit. The bearings seem to be to tight. Weird thing is I have had 3 different cams in these exact bearings. I would assume the used one I bought is bent or not the right tolerance to start with. I was going to call Hughes engines. Any other suggestions? Thanks in advance.