Sorry i missed your post, i try and check in here at least once a day, guess i just missed it ,, but you have a good idea about the dsl and trans , however in 87 there were no 4x4 dsl brought in the country and only about 200, dsl 2wd pickups with 5spd trans , also any dsl eng from 83-84 on, had the higher hp eng , the only diff in th eng was the no 2 and the no 4 main bearing , was made narrower than the previous years and just that diff picked up about 4 hp, all new brn kits are this way , but remember the 5 spd dsl 4x4 was only available in 86, even though they were shown to exist in some advertising,anyway a nice running truck is the trooper with a normal asperated eng and a 5spd spd is an easy swap and will make a very dependable and long lived veh, and the best part is it will bolt right in, let me know if i can help you with any info Jerry