I HAVE A 1994 ELDO W/4.6 NORTHSTAR NEEDS TO BE CHANGED,VIN Y. IS THIS MOTOR 94 SPECIFIC ONLY. I AM BEING TOLD THAT I HAVE TO GET A 94 VIN Y MOTOR THAT IS MY ONLY OPTION!!!!!! HELP

any 93-03 4.6L northstar vin 9 or Y should be good

WHAT KIND OF MODIFICATIONS DO I HAVE TO DO