Quote Originally Posted by pennyman1 View Post
To swap out the 4 spd for a 5 spd you need one from an 83 - 86 2.0 truck as they are narrow block trannys. You also will need the front half of the driveshaft as the tranny lengths are different, and the tranny cross member. May also need to swap speedo gear to match the speedo in your truck.
Robert,

According to my parts book the drive shafts and crossmember are the same. Since the 2 drive shafts are supported by a bearing and have a slip spline it appears the difference is made up there. Has anybody else done this? I found a new NOS 5speed km132 (fits 87 and up) for $1200 shipped which I will buy. What is the way to quickly identify a narrow block from a wide >? Is it the bottom of the casting that flares out ? Mine looks like a wide block . I am only super educated on the 4d55's. Good thinking on the speedo gear.

Mike