[marxjunk]

same...the diff in the a-arms is round and oval bushings..they physically interchange..you just use the bushing the control arm comes with..dont quote me..it kinda runs together..but 70-72 use the oval..69 down i believe is round bushings

canadain built skylarks do indeed have chevelle 12 bolts, its because of the supply chain to Canada.,,its a real chevelle 12 bolt built in ether Buffalo or...hmm..forgot the other plant...

68-72 frames interchange..there are diffs but they physically interchange..ive done it...so many times i dont know how many...its been so many...

theres a lot that interchanges between chevelle and the skylark post car...look at it like this..if its a Buick part..like trim...fenders, doors, some decklids, etc and most interior stuff..its buick...but if its hardware, like frame stuff..glass...latches..regulaters..seat frames...etc..it interchanges...

ask..if i can help i will..i have a dozen post cars across the GM lines...and have parted many dozens

as far as not seeing any info on the interchanges...you arent looking in the right spot...you need a hollanders manual..not a GM manual..GM assigns part numbers mostly to specific makes...hollander is an interchange manual..and only 2 times in my life..was it the one i own wrong..and the next edition it was corrected...the Hollander is the bible for salvage yards...or was...til the internet