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TI is very aggressive, and I was unsure of it (guide wear) on a LT1 so I just went with proflows. If I did do TI, I probably would either go bonze guide or see if I could press in stock LT4 guides. Reaming can help as it allows so oil to flow deeper into the guide. I have heard that Z/28 do have guide wear issues stone stock. Could be just urban legend.
Cam Motion in general has gentle ramps and I would run with the minimum of seat pressure considering you have light valves from the get go. I think the next spring I run will be the weakest conical I can find.
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Forged short block, large duration sub .600 lift Cam Motion cam, 7200 RPM fuel cut, Pray Ported Heads, 3.85 pulley D1X, stage II intercooler, DSX secondary low side, DSX E85 sensor, Lingenfelter big bore 2.0 pump, ported front cats, 60608 Borla, LT4 injectors, ZL1 1LE driveshaft and Katech ported TB, ported MSD intake, BTR valvetrain, ARP studs, ProFlow valves, PS4 tires.
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