Motor mount swap

My 68 barracuda had a 318 in it I'm putting a 72 340 back in. after scrounging through my barn I came up with these mounts that will bolt up to the engine. Can anyone tell me if I'm going to run into any problems with my TTI headers or anything else for that matter. Also what was used on the k frame for that big *** hole the stud goes in? Just a big washer and nut? [ ATTACH=full]1715002565[/ATTACH]