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Thank you all for the detailed info. The "LS7 valves" measure 1.825 installed without rockers, but it's very difficult to get an accurate measurement with the calipers. I ordered a dial indicator, gonna take some measurements on the lift and will report back.
Gonna be tough to get a measurement with the dial indicators. A valve spring height mic is the correct tool for this job. Here’s an example in the link… https://www.summitracing.com/parts/rsc-pac-t901