I am doing and LS3 4L65 conversion on a '67 Lemans convertible. Since the LS3 weighs a lot less than the 326 I need to know what front spring to use on it to get the right height back to what it was. Car does not have AC. Does anyone have an experience with this and can help me? Thank you.

 

What do you plan to do with the car?

Andrew

 

The car will just be a daily driver

 

If you like the current ride height I would keep the old springs for now and see how she sits after the swap.

Andrew

 

on my c10 I had to lower the front about 1.5" to make up for the lighter engine. I know that's not the same vehicle by far, but it gives you an idea.

 

My 83 cutlass I didn't change anything . Car had a 307 in it but , I put an iron block ly6 in it . I think an ls3 is 70 lbs lighter

 

I swapped mine for a set of QA1 adjustable coil overs on the front of my 64 so I could precisely set my ride height. If your on a budget and it's sitting a bit too high I would just cut half a coil off and check the height.

 

I think I can use 6 cylinder springs because the motor weight's seem to be about equal, but there are multiple different springs, which ones would I use? Thanks for the help. This just a daily driver, not trying to make it a race car or raised up too high. Just needs to be as close to stock as it be. Thanks