91 Isuzu Pickup LS Engine Swap

sounds like VATS is still working.

In reply to NOHOME : I'm just not sure, but hopefully my visit to the tuner tomorrow will flesh things out.  Thanks for the input.  I'll let you know.

Pictures before heading to the tuner.

If I knew how to upload a video, I'd place my first walk-around here.  The tuner did magic.  It turns out all the problems were in the lack of proper tune on the PCM.  A couple of sensors had been deleted and the firing order had been reversed.  Once a mild setup was placed into the PCM, she started right up.

Now on to the exhaust system and getting all the indicators to work, speedo, fuel tank, etc.  Tach seems to work, battery, temp, oil pressure, all seem okay.  More to follow.

In reply to Honestbroker : did you use a rear end with disk brakes? Also if so how did you run brake lines to it since the master cylinder only have spots for 2 lines. 

You are the man. Keep doing gods work. My Isuzu I just picked up 

In reply to Ryanbaker0214 : Brakes are stock for now.  I had rear drums resurfaced and new pads/shoes all around.  There was some minor rerouting of some of the lines, but very minor.  Rear end is stock for now.  Checking with several Isuzu forums seems to say the rear end is supposed to be good for ~400 hp.  I'm not near that.  Here are a few photos.  Truck's running and behaving.

In reply to Wolf_sargent : Thanks.  I gotta tel you that the swap was a bit more than I expected.  I'm glad it's pretty much over.  I'll also say that, apart from figuring out how to fit everything in, the forums were both a curse and blessing.  I spent a ton of time trying to make sure I had good sound info.  
Best of luck with your build.  If you have questions about a Vortec/LS swap into your pickup, fire away.  I'll try to get you a good answer.

What headers did you end up using? Thanks 

Sorry for the late response.  Here's what I used.  They fit (tight) and no leaks so far.

I did not build this for racing or anything like that.  The engine presently puts out about 300 HP with single exhaust through a cat.  It's fun to run around with, but not spec'd for high power.  Tuner said it'd pull more if the exhaust was dual and the intake was more isolated.  It works for me though.

Loved following along! Thanks! At some point it's gotta go down the road! We all want more horses, better handling, etc. Driving my project makes me so happy, 2X as happy as building or fixing! And even building and fixing is my fun! 
   Steering my toy to it's resting spot last summer, with no brakes and being pushed with the dirt track Subi was a double edged sword, it rolls and so many subsystems are just days away from function! But we hoomans only get one life and for the following months I GET to travel! (Leaving New Zealand Sunday) I'll be back to my secret lab in February! I can't wait!
  

Thanks for the reply.  Doing a similar swap on a 93.  Ended up using some swap manifolds and doing a carb right now.  Any info on the alternator wiring?  My truck was already apart when we got it , so no idea what stuff went where.   Basically using some parts we've had laying around.  Msd box is now under the dash and going to hide some other stuff.  Thanks

In reply to Dunnit :

10/12SI alternators are sold with "one wire" conversions. Pretty straight forward, I believe it hooks it straight to the batt +. Pretty sure belt drives are available in every flavor. Summit? Speedway? A favorite of dirt trackers.