[markjohnson]

I did a cam/lifter swap a little over a year ago in my LS-6 454. I used a very large Comp Cams solid lifter grind along with Comp's own flat tappet solid lifters with the EDM hole in the bottom of them. Quite expensive at $180 just for the lifters but worth it in the long run to avoid any problems. I'm not a fan of Rotella either because diesel oils are known to be next on the horizon for the reduced zinc content if it hasn't been reduced already! I used the Valvoline Racing Oil 20W50 along with GM's Cam/Lifter break in additive and so far have no problems to report. I probably should have broke the camshaft in properly by using the outer valve springs only, but my '55 Chevy ex-C/Gasser has the engine set back very far under the windshield and dash and this would require total engine removal. One more thing, I've never been a fan of the half hour/2500 RPM thing. Just seems to hard on everything. I like to run them at 2500 RPM for just a few minutes several times with COMPLETE cool-downs between each session. That's probably what you don't read in the magazines, but it has been very successful for me for a long time. Good luck.