there is a cover which prevents the ingress of road dirt and water through the slot for the trans cross member bolts. this one had rusted right away and the rust was starting to eat away the inside of the chassis rail
….then treated with phos acid to convert the remaining rust.
this will be painted with a Zinc rich paint and wax treated to prevent rust coming back.
New floor,outer sill/chassis rail and seatr box panels roughed out to be welded into place when the new jack points are made . The jack points are welded into the sill box sections