As you can see in my sig, I have an '83 with a 20r and a 4 speed. I like the idea of having fuel injection not to mention a little more displacement and an extra cog with a 5 speed. What needs to be changed to accommodate this engine?

 

the wiring and fuel routing will be the hardest part. your truck rolled off the line with a 22R and 5 speed, so you've been cheated by a previous owner by the sound of things.

a 22RE and *early* 5 speed('81-83) is a direct physical bolt in(have to wire the computer and sensors, and run hi pressure fuel lines and pump for the EFI), a better, stronger late model 5 speed needs to have the crossmember relocated back about 4" and the drivelines resized.

 

in my opinion ... the earlier style (84) is the best to install .

I did one just a while back


and it actually was quite easy ... because of the early style , the speed sensor is not necessary , If you go with the newer 85-88 / 89 The speed sensor is incorperated in the speedo , and will need to be included .


With the earlier style , there really is only about 7 wires , and 2 relays ... quite simple ... the hard part is finding one ...

 

actually wasn't the speed sensor only used on the '89-95 trucks? the trucks didn't get an electronic speedometer until '92 or '93.

 

mostly on the automatics , or maybe it only the autos , but book shows it in the speedo from 85 up ...