Just get a set of pre-made wires for the donor engine. The length of the wires should be pretty close to right, and the only thing to check for is whether you have a remotely-mounted coil, or one that's incorporated into the cap. There will be an extra wire from the coil to the center of the distributor if you've got the remote-coil type setup.
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!