to me the problem with seats like that is the height - need to be lower so when you look in from the front or back you just see the top of the seatback - having that headrest part stickin up just don't suit
the window hardware will be a problem unless you can find some loose from a really wrecked burb - one of the scarcer items I think
for the front clip, be aware that the hood hinge mounting points are slightly different between the early and late Task Force trucks, and it can be a hassle to get things to fit, also the 58/9 frame is about 2" longer at the front because of that gravel pan below the grille - it hasta be cut as shown
here by the chalk mark , then ya hafta drill new holes for the bumper bracket - the 4eyes will grow onya with time, I solved the problem by having onea each
ya might not wanna know if yer hubby will agree to plan B
Bill