does anybody know if 1970 pontiac gto lower a- arms will fit a 1967 chevelle

Yes :) Bushings may be different, but it will fit.

All GM A-Body 64 thru 72 front control arms are interchangeable without modifications. There were three different styles. See this link.
http://www.leverfamilysite.com/A-Body_three_types_of_lowers.htm

thanks thats alot of help