Terry,
Only about 95% sure.....way back when CR's was a Rutherford company, he used/attempted to use the Cobra frame for the Healey's. The Healey's were popular then and the body was changed and also making their own frame for the Healey. But, when it was first generation Healey you would use the top holes which did require different lower control arms. Another free 2-cent guess!
DV
PS, Yes..cpteddie's, as long as they are basically the same lenght or able top get the same lenght they should work fine.