I almost don't think I am getting enough squat. The 60' from the run this picture is of was a 1.69.

Info on the car:
Mild LT1
Yank SS3600
3.42 gears
MT ET Street 26x11.5
QA1 12 way with 300lb springs upfront
Stock rear springs/shocks
QA1 subframe connectors
Lakewood rear lower control arms, relocated in lowest hole
UMI torque arm relocation, second from the top setting

 

Looks like you need a little more air in the tires.

 

That is with 17psi, I really don't think it hooks as well with much over 18, I tried 20 psi a few times, it was cutting 1.8 60's

 

You need some adj rear shocks.

 

How much power does the car make? Because I know that with my car, mine dynoes 380whp with a 3200 stall and 4.57's and with the new MT pro tire I am power limited on my launch. I can full transbrake launch the car and it dead hooks and does a 1.63 sixty foot. It could be that you just need more power or more gear.

 

Your 60' times seem on par. Imho I think the gear is hurting you. Little more gear will wake that 60' up.

 

I'm running same gears, 28x10's, 4k stall and have cut 1.57 in cool weather. Dead heat summer time I cut 1.62 60's.

Run 18psi all stock rear suspension with lca's.

 

The converter probably helps.

I run N20, these runs were N/A.

I plan on a 3.90 gear sometime this winter.

 

You have a lot more gear, and are leaving off a trans brake, so I think that seems right.

I leave off idle.

 

Do you guys think the bottom hole on the LCA brackets and second to top hole on the TQ arm mount is a good location?
Stock height car.

 

Actually the rear is lifting as it wants to plant the rear tires and the axle wants to rotate up.
Maybe try some different launch techniques ? But I think you're at the limits on that converter/gear combo.