Has anyone ever somehow attached the 1970-1971 upper spring basket to a 1972-1974 seat back? I have 1972 seats that came with my 1970 Barracuda and I'd like to use the correct seat covers and foam. If I bought springs, the thought crossed my mind to tack weld them on. Worse case would be just to locate used seats or even buying the Dynacorn frames. Figured I'd check to see if anyone pulled it off first. Thanks.