Dave, I'd use the urethane front mounts to provide a little "give" to the system when going diagonally over a bump. Ladder bars are pretty harsh on the street with solid Heims. Also, cobble up some retention loops for the front. If the tech inspector at your dragstrip is worth his salt, he'll be lookin' for 'em. Morrison shows 'em at the bottom of page 32 and calls 'em a 360* front brace kit.....
http://www.artmorrison.com/2006cat/32.pdf