1988 Cadillac Seville Computerrized ABS unit change over to

I'm in position to change the ABS unit on the car cause it either went out or has a shortage in the wireing, but either way it does not work. So I've been on the fence about paying for it to get fixed which would cost me more than the car is worth to get fixed (3,000$)or just buying a brand new regular brake booster an master cylinder for 154$ new. But the real question is if I did so will the brake lines match up or do I have to buy new ones as well? Thank you