Sway bar

[MaSnaka]

I notice without the rear bar and still using the original front bar my rear end articulates a lot more causing inside tire rub in certain situations...usually pulling in or out of driveways. Thinking I should put the rear bar back to tighten things up. I changed my rear lower control arms to an adjustable tubular type and so to install the rear bar I need to fab someway to attach it. Would the lack of a rear bar cause understeer?

Thanks,
John