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Hey Butch, many Thanks for the kind words! Yours still running strong? You going to get it down the 1/4 mile next year?!!
Yep Yello, you're in the same situation as bgetz was with his 04. Just about any cam change demands better valve springs, and even pushrods, than the stock LM4 has. The LS2 came stock with much better valve springs that are usable up to the point of coil bind issues. Comp Cams has a drop in set of beehive springs that work nicely for the type of cams you're considering. You might consider changing your valve seals while you're in there, since you have some miles on your R. The first picture below is looking from the engine back to the upper cross brace. The semicircle in the right side of the opening is what I cut out for cam removal clearance. There's still a plastic oval insert in the opening that is removable that I haven't taken out yet. With it out the cam will slide into that opening for removal. Also seeing the air cond. condenser in the picture, reminds me that you can move it around enough to get the cam out without breaking the lines loose - saves a recharge. The second photo is just for anyone reading this thread with an LS2. It shows an aftermarket timing set that is correct for that engine. The LS2 has the cam positioning sensor moved to the timing cover (notice the half circle raised portion on the cam gear), where as the LM4 and all Gen 3 engines read cam positioning from the rear of the cam. So, any good timing set will work in the LM4, but you need a dedicated Gen 4 set for the LS2. ARP does make an upgraded set of timing gear bolts which I used, as some of the fasteners scare me on the stock engine. On that topic, the crank bolt is NOT reusable as it's a torque to yield piece.
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