Comic Crusader was a landmark fanzine. Its popularity today is evident from the high prices that issues sell for on eBay and other internet auction sites.

Publisher of Comic Crusader Martin Greim answered my inquiry about JSA content in Comic Crusader.

"Comic Crusader had numbers of articles and art on golden age topics.
Besides the Seven Soldiers of Victory article and articles on The Ray, Ghost
Patrol and Airboy and other greats of the '40's, I did have some JSA heroes
in those issues.

Comic Crusader #1 had a Green Lantern vs Harlequin article. The issue had
art shots of GL, Hawkman and Starman.  CC #2 had an Injustice Society
article.  CC #3 had a Hawkman's headgear article showing all his various
headgear.  CC#5 had an article and art on Wildcat and Mr. Terrific.  CC#6
had a short Green Lantern article."

More info when I find any.