Finally the decision has been made.

Jax340Dart said

J heads with 2.02 valves, the guides were cut down and the spring pads were milled off to get the spring height,plus they were gasket matched ported

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What springs are you running? And at what height? They recommend their 73949 springs. I figured I would have to cut the guides down I was unaware the pads had to be milled off as well. Thanks for that info.