Block, shackle flip or spring?

[TJ.]

Hey guys, I've purchased a 1972 K10 that I'm importing to Australia.

The truck came with a 4" lift (blocks in the rear) and dual shocks all round.
The previous owner has told me that it's unbearably stiff. I'm aware the dual shocks can't be helping so I've ordered a set of Bilstein 5100's.

So I'm tossing up between getting
- 4 new TC E-Z ride springs
- Leaving the front spring and getting a rear shackle flip
- Leaving the springs/blocks how they are.

I've never driven the truck, so I'm not sure how bad it is. I don't want to make this thing too soft and have a bunch of body roll (I don't want to run sway bars) which I'm worried about with the E-Z Ride springs.

I also don't want to do the shackle flip and have the front way too stiff for the rear.

Or I just bite the bullet and leave it as is, I might get it in Australia and it be very uncomfortable.

The cost is also a factor, with the currency at the moment the springs will cost me around 1250AUD, but I'm willing to pay that if it will make the truck that much nicer to drive.

I've done a lot of searching but haven't seen the comparison between all three, any help/opinions would be great.

Thanks, Todd.

Here's some pics of the setup how it is.