Hooker Header install issue..

Car is a 1966 Barracuda, 360, 727 automatic. The headers are Hooker Super Comp 5208HKR. The motor mounts are from Schumacher A63LA (340/360) mounting brackets. I have installed the shorter blocks that are in the picture.. I never even considered the engine mount brackets could be an issue, from what I hear they are a proven part, but maybe I'm wrong?