Modifications on a 4.5/6 drop

[rubberbandit]

I have a bare frame and am ready to place suspension on my first frame-off restoration. I like the 4.5/6 drop. I have new CPP 2.5" drop spindles and 2" lowered springs ready to install and will be putting 6" springs in the back.

What modifications should i make at this point? Should I C-notch the frame? Should I replace the trailing arm crossmember and/or the trailing arms? I am using the stock control arms and haven't altered them at all. Is this okay?

I have done searches on these and would like to know what you guys would do or have done and why? Is there something you wish you would have done? I just want to do it one time and do it right but don't want to spend a ton on unneccessary modifications.

Thanks for your help

[SCOTI]

If you ever plan on going lower than the 4/6 (or carrying a decent load).....

It's really easy to do a c-notch now vs later.
It's also alot easier to do an aftermarket truck arm crossmember which allows for running the exhaust up higher/farther from the ground & allows more clearance under the frame.
Stock truck arms work fine.... Porterbuilt truck arms work better.

Also consider shock relocation brackets to optimize the shock travel/geometry & an adjustable 'long' Panhard bar vs a stock length unit.