Just picked up a Caddy 65 Deville with a 500ci engine. Looking for some good irecommendations on a bag set up. I took a look at universal suspension Flag ship kit for around $2200 with the extra tank. I also understand that I need to cut the tunnel to the drive shaft out and extend upward into the cabin. What other things should I know before jumping into this project. I was told to ensure that I cut the cups down to get more depth on the drop. Any idea about how high they should sit. Also people at universal told me it was a bolt on however I have seen many people weld the brakets on. Also has anyone went with a mustang suspension kit with tubular A-arms. Thanks for the guidance.