personally I think the ferrari gto kit is cool and think you stick with that car and have some finish it I have a 1974.5 260 that i am having to do alot of rust repair on and so far is been tedious cuting out all the rust holes,cutting out new steel, and welding it in. It will be alot cheaper to have body kit installed the rust reair depending on how severe the damage. I finding all sorts of holes some just bondo over. I would sell the rest, keep the gto.