Are The '73-'76 Upper Control Arms The Same For Disk And Drums

StrokerScamp:
You are correct about certain things, and you are wrong about others.
The 1973 to 1976 A body cars were all big ball joint, wether it had drum brakes or disc brakes. It made no difference what so ever.
You are right in the statement that drum brake cars, were the small 4 inch bolt pattern in 73 to 76.

Ok.....well let me say this then. My 73 scamp musta had the drum brakes swapped out on the front for more drum brakes. It had small bolt pattern suspension with small ball joint upper control arms. Disc brakes were not on the build sheet or fender tag, so somebody swapped drum for drum. How stupid does that sound to you? If I am wrong, I stand corrected. It won't be the last time.