Ls swap mounting issue

Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.

B

bruisedbanana79

Junior Member
Joined
May 8, 2023
Posts
16
Reaction score
22
Location
San Diego, CA
First Name
Jeff
Truck Year
1987
Truck Model
Suburban
Engine Size
6.2
Working on my 1985 ls swap (4.8, 4l60e, 208 TC). Used dirty dingo slider mounts and even with the engine pushed back as far as possible in those mounts my transmission crossmember and driveline is about 2.5” pushed forward. Obviously I can shorten the front driveshaft and have a new rear one built but that is costly. Does anyone have any ideas on how I can get the transfer case pushed back more?
You must be registered for see images attach
You must be registered for see images attach
You must be registered for see images attach
 
Rustisbest

Rustisbest

Just the facts
Joined
Jul 20, 2021
Posts
182
Reaction score
456
Location
Athens, TN
First Name
Matt
Truck Year
1979
Truck Model
C10
Engine Size
377
Are the slots not to the rear of the bolts? Looks like it's all the way forward to me.
 
C

CalSgt

Full Access Member
Joined
Oct 3, 2021
Posts
1,701
Reaction score
3,767
Location
CA
First Name
Casey
Truck Year
1980
Truck Model
Chevy K-10 Custom Deluxe
Engine Size
350
Rustisbest said:
Are the slots not to the rear of the bolts? Looks like it's all the way forward to me.
Click to expand...
Same

Engine should be almost touching firewall
 
B

bruisedbanana79

Junior Member
Joined
May 8, 2023
Posts
16
Reaction score
22
Location
San Diego, CA
First Name
Jeff
Truck Year
1987
Truck Model
Suburban
Engine Size
6.2
CalSgt said:
Same

Engine should be almost touching firewall
Click to expand...
Yes the the slider mounts are pushed as far rearward as possible only adjustment left in them would be pulling the engine forward. I do have about 2” between the head and the firewall which made me think something is off. Now the suburban had a diesel in it from the factory and I can not seem to find a clear diagram on how the frame pads differ from a Sbc to a diesel
 
B

bruisedbanana79

Junior Member
Joined
May 8, 2023
Posts
16
Reaction score
22
Location
San Diego, CA
First Name
Jeff
Truck Year
1987
Truck Model
Suburban
Engine Size
6.2
Rustisbest said:
Are the slots not to the rear of the bolts? Looks like it's all the way forward to me.
Click to expand...
You ever have one of those moments where you question everything you know about cars…..between the old man and myself over 60 years of building experience and we have the engine pulled all the way forward! Thank you for both of you two for seeing this. Looks like I’ll probably have to figure out the trans dipstick since it is closer than 2.5” to the firewall right now. But that is cheaper than new driveshafts
 
Rustisbest

Rustisbest

Just the facts
Joined
Jul 20, 2021
Posts
182
Reaction score
456
Location
Athens, TN
First Name
Matt
Truck Year
1979
Truck Model
C10
Engine Size
377
Edit: we were typing at the same time lol.
 
Last edited:
C

CalSgt

Full Access Member
Joined
Oct 3, 2021
Posts
1,701
Reaction score
3,767
Location
CA
First Name
Casey
Truck Year
1980
Truck Model
Chevy K-10 Custom Deluxe
Engine Size
350
bruisedbanana79 said:
You ever have one of those moments where you question everything you know about cars…..between the old man and myself over 60 years of building experience and we have the engine pulled all the way forward! Thank you for both of you two for seeing this. Looks like I’ll probably have to figure out the trans dipstick since it is closer than 2.5” to the firewall right now. But that is cheaper than new driveshafts
Click to expand...
Dipstick tube should be able to move a bit, just bend the tab where it’s bolted to the bell housing
 
justhorns

justhorns

Full Access Member
Joined
Jun 1, 2022
Posts
295
Reaction score
789
Location
Denver
First Name
Lee
Truck Year
81
Truck Model
C10
Engine Size
250
Driveline industries in Denver can shorten and lengthen existing driveshafts. I'm sure yours can too. Also, you must ask yourself "where do I want the motor?" How is fan/radiator clearance (should still be big). It seems to me that getting the distributor away from the firewall would be a big advantage. If clearance is good, work on the driveshafts. How much has the LS swap cost vs driveshaft cost?
 
C

CalSgt

Full Access Member
Joined
Oct 3, 2021
Posts
1,701
Reaction score
3,767
Location
CA
First Name
Casey
Truck Year
1980
Truck Model
Chevy K-10 Custom Deluxe
Engine Size
350
justhorns said:
Driveline industries in Denver can shorten and lengthen existing driveshafts. I'm sure yours can too. Also, you must ask yourself "where do I want the motor?" How is fan/radiator clearance (should still be big). It seems to me that getting the distributor away from the firewall would be a big advantage. If clearance is good, work on the driveshafts. How much has the LS swap cost vs driveshaft cost?
Click to expand...
No distributor on LS, they’re fired by coil packs mounted to the valve cover
 
B

bruisedbanana79

Junior Member
Joined
May 8, 2023
Posts
16
Reaction score
22
Location
San Diego, CA
First Name
Jeff
Truck Year
1987
Truck Model
Suburban
Engine Size
6.2
Well ladies and gentlemen I was not firing on all cylinders yesterday . Was able to slide it back within 3/16” of the firewall and now both driveshafts fit like factory! Huge cost savings
 
You must log in or register to reply here.

Similar threads

B
1985 K2500 Build/LS Swap
2
Replies
18
Views
2K
SquareRoot
SquareRoot
Urbanburban22
The Overlander: Gen3 LS, 6L90, MP1125 AND BODY SWAP
Replies
3
Views
415
Urbanburban22
Urbanburban22
B
Help with difficult problem!!! ‘83 K5/4” lift/NP208 mounting height with incorrect homemade spacers vs correct spacers???
Replies
8
Views
959
rockriver
R
S
K10 ls swap help
Replies
3
Views
3K
Camar068
Camar068
iamtherealJayy
LS swap transmission choice
2
Replies
15
Views
6K
wlwarnke
wlwarnke

Latest posts

Forum statistics

Threads
44,165
Posts
950,712
Members
36,279
Latest member
MTBR12
Top