Re: T18 identification
They might be T-19's, probably with a 5.10 1st synchronized 1st gear. They are pretty much the same as a T-18 only with the synchro first. The adapter kits are essentially the same, the mainshaft might differ only slighly. 13-09 will signify a T-19 casting number, and 13-01 will signify a T-18. Also, a T-19 will have PTO plates on both sides of the tranny and the T-18 will only be on one side, usually the passenger side on Fords. Hope this helps.
1978 CJ-5 258 Weber, 'glass body, 6.32 low Ford/Scout T-19, 2.46 low Scout/Ford/Jeep Dana 20