the tag on my Y-block, was a cam tag, from Neilson cams, in farmington Utah.the following is what the original tag read if the downloads dont come out.

Engine..... Y-Block ford

Cam Grind.....280M

Valve Lift      .465" @ 1.54 ratio

Duration.....280 Degrees (232 Degrees @ .050")

Valve Clearance     .026" in & ex

110 degrees L.S.A.

Nielson Cams

644 west 100 North

P.O. Box 416

Farmington, UT 84025

       The folks at neilson cams were nice enough to decode the tag, send me a spec sheet,decal and explanation on valve lash, from a grinders perspective and a price sheet to boot.

 Now with a little more help maybe I can figure out what kind of build this really is...is there a way of getting more info without tearing it down? like maybe measuring the amount of air displaced? is there a tool for that? sorry to be a pain but this is all greek to me, and the motor appears to have been put together really well I would rather not tear it down.

THanks

John