Is the geometry between the Mark IV and the Mark V the same? My 78 Pro has a 58cm top tube and a 60ish cm seat tube.
__________________
|^^^^^^^^^^^^^^| ||
|......GO.BROWNS........| ||'|";, ___.
|_..._..._______===|=||_|__|..., ] -
"(@)'(@)"""''"**|(@)(@)*****''(@)