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 During mock-up, a set of COMP...  During mock-up, a set of COMP Cams pushrod length checkers is perfect for helping determine the right setup for your engine. With a lightweight checking spring in place of the real valvespring, and some layout dye or a Sharpie mark on the tip of the valve, rotate the engine over with a testing pushrod in place. Adjust the pushrod length until the wear pattern across the tip of the valve is shortest. Regardless of whether it is centered on the valve, the shortest sweep pattern reveals the pushrod with the best geometry. Shoot for .060 to .080 inch as the very widest acceptable pattern.  If you let your machinist...  If you let your machinist know you have a dial-bore gauge and plan to double-check their work, they might get a little offended, but more than likely will concentrate a little harder on making sure your bores are round and straight. A Sunnen gauge and setting fixture like this will set you back close to $2,000, but there are several more inexpensive gauges available that you can use a micrometer to set, and they prove to be quite accurate.  Cam bearings don't come out...  Cam bearings don't come out by themselves. A professional tool like this might cost over $400, but there are several manufacturers who make them for around a couple hundred bucks. Remember when you picked up your engine from being machined? It probably packed the oil passages behind the cam bearings full of trash so you need to remove the bearings, clean the engine, then stick in a fresh set along with the freeze plugs and oil galley plugs.  COMP Cams also sells a "sportsman"...  COMP Cams also sells a "sportsman" and a "professional" head CC'ing kit. The pro kit has a glass burette with a stand as well as a block-off plate to seal the head. A light smear of grease around the chamber keeps the measuring fluid (denatured alcohol ideally) from seeping out and skewing the reading. With the chamber measurement you can now use a calculator and your gray matter to find the true compression ratio.
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