I'd leave the L20B & box in it. Get some large front brakes & struts (200B or Stanza), & see if you can find a H165 rearend from a 1200 ute or a Borg warner rear end from a Corolla (correct me if I'm wrong please Harry). Some cheap mags from Ebay or a wreckers, 13-14 inch with good tyres, a good spring set front & reset rear leafs with the main spring turned over, good dampers/shocks front & rear, a 2&1/4 inch exhaust, repair any rust & give it a good polish of what ever paint's still there. You could use the auto trans tunnel from a 120Y to cover the gearbox, or you could fabricate one yourself, depending on your skill level. If you go to the A15, you still need do most things in this list. The best way to drop the A15 in without too much trouble is to use a late 1200 ute crossmember & engine brackets, the gearbox crossmember needs to be made. Don't forget to browse through the photo album, as lots of little tricks & solutions have been posted there over the years. Anyway welcome to 1200.com & we always like to see photos, so don't forget to post some of your own.