I just scanned your other thread.
what's your plan for the flywheel? Are you just going to redrill the Northstart wheel? I'm guessing by the fact that you have that spacer plate that will be your approach.
I'm sort of in the process of the same swap. But I went back to school and I'm a year out from graduating. Plus we just had our first child. So no time or money.

I do know that FieroGuru's starter bracket works well with the F23. I used it with the flexplate to get compression readings. Only to find a low cylinder that I can only hope is a bad DOD lifter. That brought me to a halt.

I did notice there will be clearance issues with the axle just like the northstar. But it does look like there's enough meat to clearance. I don't know what would be a safe clearance is for a CV boot clamp.

How much space is there on the transmission end? Looks like quite a bit on the crank pulley side.

I need to get motivated to get back to mine.

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SSFiero@Aol.com

Plenty of room...
IMG_20180530_073033069 by Joseph Martin, on Flickr
Jeez, I need to do some housekeeping...
Joe

[This message has been edited by motoracer838 (edited 05-30-2018).]

quote Originally posted by RCR: Good transition, Joe. Bob

Thanks Bob, I've been fighting against the idea of "being too deep in to change course"... This mindset has lead me down the rabbit hole enough to see the trap. Once I saw how cheaply I could get an LS4, there was no point doing anything but pulling the Northstar, for the first time in a long time I want to deal with this car...

Back when I started the project, it kinda made sense, the nstar doesn't make a lot of lowend torque, so it would play nice with the 282 Getrag, the more I read other nstar builds and the issues the nstar became famous for put a hurt in my desire to work on it... When vintage motocross came along, it was all too easy to push it to the corner and basically forget about it... Then the Indy Hauler, then the KZ1100 project, you get the idea...

Today was another good day...
IMG_20180531_110835771 by Joseph Martin, on Flickr
Picked up an LS6 intake.
After working with the nstar in there, I'm amazed at how much room I have, It used to be a fight for every fraction of an inch...
Drive by cable throttle body, LS7 exhaust manifolds, and LS3 cam, on the way. Coming to grip with the idea that I had to spend more money going this way, was the hardest part... (eased a bit by knowing that the nstar was going to need at least another $1,600 when I crack it open.)
IMG_20180531_183439174 by Joseph Martin, on Flickr
Coming soon, from Mad Scientist Labs, (muwhahahahaha) The handy dandy engine leveling kit.
When I originally did the nstar I spent hours working on getting the engine level on the cradle, once in the car, it just didn't look right. For my first fit of the LS4I, I sat the engine/trans combo on the new trans mounts and the right end of the engine on a 3/4" block of wood to get it in the car, once in the car I built the adjusters pulled the block of wood then by turning the trunbuckles I lowered the right end until it "looked right". Now I'll fab up some temporary stands farther out of the way of where I need to work to build all the bracketry, mounts, ect...
IMG_20180530_073033069 by Joseph Martin, on Flickr
After seeing how it looks in place, I think while it's out, I'm going to move the drivetrain to the left using up some of this room so I can get a longer driveshaft on the right, it's looking a bit tight on the right and if I'm lucky, be able to use the same shaft on both sides.

Cheers Beers n Gearz, Joe

[This message has been edited by motoracer838 (edited 06-01-2018).]

quote Originally posted by motoracer838: Picked up an LS6 intake. . Drive by cable throttle body, LS7 exhaust manifolds, and LS3 cam, on the way. .. . . Cheers Beers n Gearz, Joe

Sounds like a similar set up to mine. What ECM are you running with the DBC throttle body? Is there an ecm that does DBC and the 2 wire knock sensors that the LS4 has? I was going to run a truck ECM(plentiful/cheap). But I think I would have to use the single wire knock sensor moved from the valley to the side of the block.

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SSFiero@Aol.com

Trial fit #2
IMG_20180601_175220930 by Joseph Martin, on Flickr
Moved the package over about 7/8", needed to "clearance" the strut tower a bit to clear the shift bracket, I think this will be it's final location.
IMG_20180601_175201262 by Joseph Martin, on Flickr
Hell, with a slight notch, there's room for a blower belt... not likely... I do see the potential for a manifold and cam upgrade somewhere down the road, LS6 intake and tb along with an LS3 cam will "leave some on the table".
IMG_20180601_180742231 by Joseph Martin, on Flickr
For the hell of it I thought I'd toss on a Trailblazer SS intake, didn't think it'd fit, I hate when I'm right...
Between Ebay and Summit it's gonna' be Christmas in June next week...

When things go wrong,
don't follow them... Joe

[This message has been edited by motoracer838 (edited 06-01-2018).]