LT1/L83 into something eventually
Thread Starter
Staging Lane
Joined: May 2016
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I think I can add some further useful info here for you guys. The engine mount bosses on the LT engines stand 3/8 further away from the block centerline than the mount bosses on the LS engines do (discovered and verified in CAD program), so any swap application that has been difficult to get the front of an LS engine low enough in the frame to achieve optimized U-joint working angles is going to be even more troublesome to do so with an LT engine.
Dang, I don't need any bad news. How much difference in centerline height are you talking about? I have not even test fit my engine yet but planned on moving it as far forward as possible to allow the transmission tail to sit higher. As long as the angles are the same I should be good????
Thread Starter
Staging Lane
Joined: May 2016
Posts: 90
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okay... haven't posted in awhile but have been using my spare time cutting out and replacing floor pans, rebuilding front suspension and replacing sub-frame bushings. I have test fit the engine and have determined that there will be a clearance problem without some changes. I have a Camaro SS oil pan ordered and have started modifications to the cross member and the tranny tunnel. Looks like I will have to cut about 1.5" out of the rear of the cross member an raise the transmission tunnel about 1.5" as well to be able to properly position the drivetrain.
I have the transmission tunnel cut out and will test fit the drivetrain again before welding the tunnel back in. Same goes for the front cross member.
I have the transmission tunnel cut out and will test fit the drivetrain again before welding the tunnel back in. Same goes for the front cross member.
On The Tree
Joined: Sep 2004
Posts: 113
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okay... haven't posted in awhile but have been using my spare time cutting out and replacing floor pans, rebuilding front suspension and replacing sub-frame bushings. I have test fit the engine and have determined that there will be a clearance problem without some changes. I have a Camaro SS oil pan ordered and have started modifications to the cross member and the tranny tunnel. Looks like I will have to cut about 1.5" out of the rear of the cross member an raise the transmission tunnel about 1.5" as well to be able to properly position the drivetrain.
I have the transmission tunnel cut out and will test fit the drivetrain again before welding the tunnel back in. Same goes for the front cross member.
I have the transmission tunnel cut out and will test fit the drivetrain again before welding the tunnel back in. Same goes for the front cross member.
Thread Starter
Staging Lane
Joined: May 2016
Posts: 90
Likes: 0
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Thread Starter
Staging Lane
Joined: May 2016
Posts: 90
Likes: 0
I think I can add some further useful info here for you guys. The engine mount bosses on the LT engines stand 3/8 further away from the block centerline than the mount bosses on the LS engines do (discovered and verified in CAD program), so any swap application that has been difficult to get the front of an LS engine low enough in the frame to achieve optimized U-joint working angles is going to be even more troublesome to do so with an LT engine.
Looks great! I have our gen v swap fully functional. It makes great torque and the transmission shifts so nice. We did a 6l80e. Let me know if you need help modding the gen v harness. its best to use the bcm with the pedal position brake sensor.
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Staging Lane
Joined: May 2016
Posts: 90
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Thanks for the offer. I'm sure I will have some questions on this when I get a little closer. What are you running through the BCM? Thanks again!
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Staging Lane
Joined: May 2016
Posts: 90
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Hello Andrew! On trial fit it is barely below the crossmember. I'm in the process of raising the transmission tunnel and think I can get the engine a little higher and still maintain driveline angles. If I can't I'll just put a skid plate from a Hummer on it.
Thread Starter
Staging Lane
Joined: May 2016
Posts: 90
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Trans tunnel mods 
Here's a few pictures of what I'm doing to gain some room to get the transmission sitting higher in the tunnel. Pretty basic stuff, cut out tunnel, weld 1.5" strips onto each lower edge and set in place. From here I will mark what to cut to make points along firewall to fit up and then weld it all in. Lastly I will put in a transition piece of metal to close up the gap at the end of the raised tunnel to the original positioned tunnel. All welds are just spotted right now and cleaning up my welds will give me more opportunity to hone my grinding skills..... The console has plenty of room under it where the tunnel is raised so this mod will be unseen. The carpet over the raised tunnel section will most likely have to be slit tas to not affect the fit elsewhere but will hidden by the console.
Last edited by bamabob; Sep 7, 2016 at 01:02 PM.
Thread Starter
Staging Lane
Joined: May 2016
Posts: 90
Likes: 0