Im planning to buy a body kit car but i will be doing most of the work whats easier to do lambo or viper body?

this is my first project i will be doing most of the work myself... If i go with the lambo i will use a Fiero as a donor car, and if I go for the viper i will go for an old vette so what do you think is easier to install?(also the fiero has to be strechted 10 in and for the vette none)