I would reccomend highly going thru the whole front end even down to the lug bolts!(they will break also, I know been there, dun that. NOT GOOD!) It will be expensive but what price can u put on your life or someone elses? build it rite and feel safe and enjoy your ride. Ill get down from my soap box now. lol I use to own a '66 and I put a sway bar w/ brackets from a '86 silverado. the holes in the a arms matched up and the only thing you have to do is drill new holes for your frame brackets. also buy new poly bushings dont use the ones from the donor. Good luck!