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LS swap #741629
October 16th 2018 4:07 am
October 16th 2018 4:07 am
Joined: May 2018
Posts: 3
westminster, ca.
D
DCol63 Offline OP
stranger
DCol63  Offline OP
stranger
D
Joined: May 2018
Posts: 3
westminster, ca.
Hi everyone,

I have a 1974 GMC 1500 and I'm looking to put a Gen IV, 6.0 L with a 4L80. Has anyone come across any particular problems with the install such as clearance to the frame or the doghouse? One concern I have is that the a/c compressor may be a problem. Any advice or suggestions would be greatly appreciated.
Thank you in advance.

Re: LS swap [Re: DCol63] #741637
October 16th 2018 11:07 am
October 16th 2018 11:07 am
Joined: Nov 2013
Posts: 1,093
West Texas
W
Wedgy Offline
old hand
Wedgy  Offline
old hand
W
Joined: Nov 2013
Posts: 1,093
West Texas
DCol83, Hello and welcome to the Site!

Pretty ambitious swap, and gotta love Goin Big!

Safe to say the front cross member comes out. Seen a few swap threads on here with pics. LS? IDK. DynoDave just posted up some info on the Chevy/GMC post 1995 GMT Vans. The newest models do have the 6.0 motor. Size never mattered in the Smallblock swaps I've done, but measuring a factory Big Block G30 will tell you what they crammed in under that Doghouse.

Why couldn't an AC compressor be remotely located, and driven by an electric motor?

Re: LS swap [Re: DCol63] #741638
October 16th 2018 11:20 am
October 16th 2018 11:20 am
Joined: Jun 2010
Posts: 14,100
Van Diego California
frscke1 Offline
frscke1  Offline

Joined: Jun 2010
Posts: 14,100
Van Diego California
Welcome to the site DCol ....


SUNSHINE VANS-VAN DIEGO
ADRENALIN BY THE GALLON & CHASIN RACIN
ONE FOR THE DIRT & ONE FOR THE STREETS
'93 CHEVY G30 454 4X4 SPORTVAN EXT 146" WB
'92 CHEVY G30 454 BEAUVILLE EXT 146" WB
Re: LS swap [Re: DCol63] #741644
October 16th 2018 3:00 pm
October 16th 2018 3:00 pm
Joined: May 2018
Posts: 3
westminster, ca.
D
DCol63 Offline OP
stranger
DCol63  Offline OP
stranger
D
Joined: May 2018
Posts: 3
westminster, ca.
Thank you,
Is a 5.3 going to be much different?I thought they were the same size. I figure that I may have to maybe notch the cross member and maybe change to a lower profile oil pan.i know there are motor mount kits out there and may have to modify those. I definitely want a/c as I plan to make it a daily driver.

Re: LS swap [Re: DCol63] #741646
October 16th 2018 4:29 pm
October 16th 2018 4:29 pm
Joined: Sep 2005
Posts: 8,681
Georgia, USA
CatFish Offline
carpal tunnel
CatFish  Offline
carpal tunnel
Joined: Sep 2005
Posts: 8,681
Georgia, USA



How come you never see a headline saying ‘Psychic Wins Lottery?


Re: LS swap [Re: DCol63] #741657
October 16th 2018 6:07 pm
October 16th 2018 6:07 pm
Joined: May 2018
Posts: 3
westminster, ca.
D
DCol63 Offline OP
stranger
DCol63  Offline OP
stranger
D
Joined: May 2018
Posts: 3
westminster, ca.
Looks like a good start. I'll give them a call tomorrow.
Thank you

Re: LS swap [Re: DCol63] #741663
October 16th 2018 10:02 pm
October 16th 2018 10:02 pm
Joined: Nov 2013
Posts: 1,093
West Texas
W
Wedgy Offline
old hand
Wedgy  Offline
old hand
W
Joined: Nov 2013
Posts: 1,093
West Texas
Originally Posted by DCol63
Thank you,
Is a 5.3 going to be much different?I thought they were the same size. I figure that I may have to maybe notch the cross member and maybe change to a lower profile oil pan.i know there are motor mount kits out there and may have to modify those. I definitely want a/c as I plan to make it a daily driver.


https://www.onallcylinders.com/2017...ory-overview-gen-iiiiv-ls-engine-family/

Here's some more LS info to go along with the cool stuff from Catfish.

Good point about the smallblock size comparison. I was wondering more about the height and location of the induction plenum, throttle body, exhaust and driven accessories. You might be able to see how the newer vans mount those on the LS block to fit under the Express cowling and doghouse and may be able to use that method in your build.

My smallbocks were in a '70 C10, and a '65 Impala. You'll be going way deeper that that. Go Team LS swap!

Re: LS swap [Re: DCol63] #741677
October 17th 2018 8:20 am
October 17th 2018 8:20 am
Joined: Sep 2013
Posts: 774
Indiana
tuner4life Offline
old hand
tuner4life  Offline
old hand
Joined: Sep 2013
Posts: 774
Indiana
I wonder if you sourced your engine setup from a newer Express van if the belt drive would be re-arranged to better fit with the A/C? I've never seen one in person to compare so I'm just speculating.


[Linked Image]
Re: LS swap [Re: tuner4life] #741703
October 17th 2018 8:03 pm
October 17th 2018 8:03 pm
Joined: Nov 2013
Posts: 1,093
West Texas
W
Wedgy Offline
old hand
Wedgy  Offline
old hand
W
Joined: Nov 2013
Posts: 1,093
West Texas
https://www.youtube.com/watch?v=arAnA65RMNo

Some more info for your LS swap D,

No more Gasoline powered Vehicles by 2050? I find I kinda don't think so.

Here's an LSIII going into an early Nova Wagon. Worth watching. Nice shorty headers that look promising. Then, at 6:20, She goes into detail concerning the motor plate/engine motor mount components. Mentions difficulties with the AC drive, and names some suppliers in the video. Funny flexplate lessons. Flip Flops made me cringe, but one loaded ratchet to a toe will cure that.

Hope this helps. Good American Family Fun Video. Cute Dog, Good Skills, Nice Car!

Quality Chevrolet never could get the correct lower mount for one side. I ended up chaining down the high side of the motor in the Impala. '73, '74? Always a good idea anyway. Especially a 283 backed up by a PG... grin Traded that $250 '65 Impala to my BILaw for a '59.
The drivetrain then went into his Econorail. shift
Carlsbad Raceway is buried under a Business Park now. But the Heartbeat of America lives on.


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