My '87 with 318 2 barrel has a 727 followed by a 8.25 diff. I have a narrowed Dana 60 I am going to install and will replace the 727 with a small block OD. I want one that is non-lockup and manually controlled OD (dash switch). My question is what trans would be best and how do I identify it? I know I will need to shorten the drive shaft with the Dana swap and the OD changeover, I only want to do it once.