Top end noise

72DartSwingerV8 said

Oil pressure has always been good, about 60 when I first ran it. I'm afraid of that too, the guy said they didn't even test drive it because the sound came up but I'm gonna check the mileage on the receipt. Oil holes are in the right spot, I know that because I put them on backwards then fixed them. I didn't check preload as they all seemed snug. How do you test preload?

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I like to use a dial indicator with a magnetic base during engine assembly with the indicator rod right on the lifter plunger before the intake is installed. This is the most accurate way but won't really work with non-adjustable rockers without loosening and tightening the rocker shafts 8 times. You could use the thick feeler gauge and scratch awl method and be close enough for government work. The only way you can adjust your preload with non-adjustable rockers is by purchasing longer or shorter pushrods.

I'm a big proponent of adjustable rockers on all builds. As old as these engines are and not knowing who's had there greasy mitts on 'em over the years leaves a lot to chance.

Anyway, I'd pull those valve covers first and see what's up.