The 4.3 vortec is only a good motor inthe 93-94 200 hp flavor,other wise its like 190.So really whats the point,a 3.3 with headers and a intake makes the same power.If your going to be swapping to a gm engine why not get a small block like a 305(non-vortec),they get great gas milage and have the tourqe to get up and move pretty good.A th700 tranny and a 305 would be a great combo.I say this because to switch from one make engine to another in a car isa lot of work.Just changing the 3.0 to a 4.3 will require a full electric swap,new tranny,drive shaft,t-case...and in the end you get a engine that doesnt make much more power then a 3.0 with headers and intake...