Clearance issues with new headers.

Hey team, Running into issue with passenger side idler arm hitting header on install. Any ideas what is the fix? New set of hedman headers in a 74 Duster with 318. Had headers on it with no issue. Installed new ones and passenger side hits idler arm/tie rod bad. I'd have to cave header in a lot to clear it. Spool motor mounts and power steering. Crazy part is the driver side fit great. Any ideas. I really don't want to put the old rusty headers back on it. Would the chassis need to be under load to line up? Right now on jack stands.