I dont intend to use ka hubs or wishbones so cv size and driveshaft length is irrelevant.... thats why i want it all puma upfront. less complications to maintain.

The mk3 fiesta floorpan is significantly different to mk3.5 Mk3.5 is basically the development mk4 floorpan. Aft of the engine bulkhead, the floorpan is virtually identical to mk4 fiesta upto turret hieght. Even the seat mounts fit etc. The front chassis legs are modified from mk3's and an interim for the older engine packages of the mk3/3.5 compared to the mk4.

The front subframe bolt centres are the same in many key places as are wishbone pivot dimensions and ARB locations