What's a good starter suspension system that can be upgraded later?

Hello everyone,

I'm currently restoring a '72 Demon which is mostly just a shell body on a rotisserie.

My intentions for it is to make it a slightly resto-mod street rod. I'm currently trying to get it on the road as quick as I can.

I'd like to use a Hotchkis TVS suspension system, which is around $2,000. However, if I can put in a suspension system that's cheaper than that for now, I can get the car on the road quicker and then later on make upgrades.

So my question is, what would be a good baseline mixture of stock and upgraded suspension parts to start out with? I was thinking about buying upgraded leaf springs, shocks, and sway bars and leaving the rest stock.

I am adding subframe connectors and a radiator brace while the car's on the rotisserie so those should help as well.

Thanks!