How low can I go?

[OneOffStroker]

On my '69 Burb, I have 3" springs up front with 2.5" lowered spindles, and 4" coils and 2" blocks out back. It definitely sits with some rake still, but it is certainly low. I'm running tires that don't seem to be much larger than what you wold expect to find on a truck like this, and I had to do a LOT of modifications up front to minimize tire rub. I have 30x9.5-15s up front and 31x10.5-15s out back. I had to completely eliminate the stock inner fenders and fab some that only cover the top area, and I had to completely roll the insides of my fenders. However, they still rub a fair amount when I turn at full-lock.

The good news is that with shock relocaters in the rear, new panhard bar, and drop shocks all around, it actually rides pretty well. It's no Caddy, but it it much, much, much better that when I first got it and it had cut coils up front and compressed coils in the rear with bottomed out stock shocks and riding on bumpstops all the time.

I don't think C10 coils will make a difference. I'm sure that when you compare the structure of a burb behind the front doors with the structure of a pickup from the same spot, there won't be as much of a difference in weight as you may initially believe. For instance, the pickup bed is double-walled, the burb's quarter panels are not. There is more bedwood in a truck, not to mention attaching hardware. So...if you can only get C10 springs, then use them.