Ladder bars will work very well - and you can leave your frame rails in - If you ever want to go a NSS class - there are strict rules on altering the rear frame rails - hence the reason the majority of cars are ladder bar. If you do go ladder bar you want to use the longest bar you can and have the ladder link feature to make adjustments easy. Caltrac set ups work really good also - in a 3800 lb car I can yank the front wheels footbraking on 9' slicks