Chevy Malibu's in the late 1970s SB V8s had the dipstick in the pan instead of the block.Why don't You do that with Your inline.The dipstick tube was rivited and soldered to the pan.This was a Hollander number #437 oil pan.Look at one of them and it should give You some ideas as how to do it.
EvilDr235
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Two types of people drive old cars.Rich people because they want to and poor people because they have to.
Remember EvilDr235 has a cure for Your sixness.