Compare the length of both forks, both the inner and outer dimensions from the pivot ball. The inner dimension is the most critical, since the fingers that operate the throwout bearing need to align exactly with the center of the hole in the bell housing. It's fairly simple to figure out and fabricate the geometry to make the outside dimension work right.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!