If you're really serious about this, then there is plenty of research to be done on your part. You have to search the US forums for more info as not too many of us have done this here in Oz
The 242 is a straight in bolt on. However I would go for the 242HD which has thicker chains and definitely a lot stronger and worth the hassle of hunting, sniping, shipping, installing and use!
. I've gone another direction.. 5.38 4Spd.
You may have to install a hack and tap SYE .
Heaps of info there on JF, JU, Pirate, MC, FB, NACGA, Instagram, G+. etc.
All the best and more Googling I'd say.
Oh yeah, have you sourced the gear bezel and figure out how to change it? There'a a special technique for taking the shifter out.