Looking for an old magazine

Thanks for the help but that's not the issue. I found it, it's the August 1978, Vol. 5 No. 8 issue.

Could this be it?

"Old Crow" by Roger Hathaway, Military Modeler, Vol. 5, No. 8 (August 1978).
This is a very old but excellent article, it has probably been re-printed since, however the magazine is now defunt. Hathaway describes how to convert the Tamiya Lee into an M31.

Found it cited in an online build.

Probably not the one you are looking for, but here's one from '78, available on Fbay.

If you know the issue,maybe ebay