I just pulled the tub off my 87 last night to do the same swap. I found a 4.2 , T177 and NP 208 . I didn't measure from the firewall but was thinking of just matching the position of the motor / bell housing joint, would this work too?
Well we did this swap on a 92 YJ and we just got it running the other day. If you do this swap I would recomend putting the HEI distributor and also putting a weber carb on it. When we did it we were able to use one of the mounts and we had to fabricate the other one. Also when you do the swap make sure to use the sensors off the 2.5 or your gauges won't work right. Also I'm wanting to know what color the wire is going to the tach and if you can hook it up with out having a computer?
Last edited by YJjeep258; 03-14-2013 at 10:52 PM..
YJjeep258, Im not sure on the tach wire but will find out when I pull mine apart. Also with the motor mounts, would it be a good idea to make a set the is a bit taller that the old ones so that it changes the pinion angle?
Wannabejeeper, I have historic tags so no inspection or emissions.
ok thanks, so that green and white will give me a reading on the tach right? About the engine mounts we didn't raise ares which we probably should have because we put the borg warner T5 transmission which has the external slave cylider for the clutch with the flipped dana 300 and we have about an 1 inch of clearance between the front drive shaft and the slave cylinder. Now if you have the internal slave cylinder i wouldn't raise it but it is up to you. Also about the exhaust the original exhaust wouldn't work for us it was rubing the engine and to much angle down so I hope some of this imformation work for you.
Ok I got looking at the connecter going into the guages there is a green wire and a green and orange tracer wire and comming out of the firewall there is a green and grey tracer wire and a green and orange tracer wire. I havn't seen a green and white tracer wire so could one of those wires be for the tach signal.