Which motor is better to turbo the gm 6.2 or the navistar 6.9
 

Ok so i have a 1987 f250 6.9 idi stock with a5spd and 4x4 i also have an 85 m1009 blazer with the 6.2 i also have a banks sidewinder turbo sitting on a shelf i have all the piping just no manifolds so my question is which motor wld be better to put it on