How can ya tell a 1.5 from a 1.6 rocker? Mine are an older set with nothing laser etched on them, and Previous owner thought they are 1.5s.

I guess I should call Harland Sharp, Mine are on the way too them to get a rebuild job.

Their web site shows the 1.5s pushrod oil hole a little bit farther from the adjuster base than the 1.6 but They never say in the reading.

Kasey

Lower right side of page.
http://www.harlandsharp.com/bb_mopar.htm

Thats for a big block, Mine is a small block, sorry I should have had that in the origional post.

Kasey

Thats the picture on their site, Its bigger there, and It looks like the only diff is the hole location.

Kasey

You have to think like a lever.

To get more lift ( higher ratio ) , the driven side needs to be closer to the pivot.
This isn't much help when you don't have a dimension or different piece to compare it to.
But you can tell from the pic that the 1.5 hole is closer to the edge of the arm.
Doesn't matter which block it is for , that's just how geometry works.

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You have to think like a lever.

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I see that now. As soon as they get back from Harland Sharps shop, Ill check them over a little bit better.

Kasey

If you can't tell by looking at them, set them up on an engine and measure them. First, measure the lobe lift on a cam. Say the lobe lift is .300". Then measure the lift at the valve side. If valve lift is .450, then you have a 1.5 ratio (.300 x 1.5). If the valve lift is .480, then you have a 1.6 rocker (.300 x 1.6).