Hi Dennis, They sit on the same spot, and line up with the same bolt holes, that the original shocks did, but I had to grind down the fixed nuts flat (ever so carefully so as not to remove any metal but the two nuts there). You have to drill out the bolt holes about a 1/16" more, but still leaves plenty of meat for a strong hold. The coil sits on the shock body via the adjustment ring. Planning to install them this weekend. I'll post pics.
'68 400HO Coupe, 4 spd, 259 interior, Windward Blue. My other car's a Johnson 15 outboard on a '61 Starcraft rowboat... Just sayin'.