front end upgrades

[thermoman]

i know it is widely schooled that the front suspension and power steering out of the 73-87 trucks will bolt into the 67-72. my question is.....will the 88-91 blazer/tahoe and suburban be the same due to the fact that GM didnt change the body styles on these until 92???? i am looking for one of these trucks that have the fuel injection and i believe fuel injection was on 87 and up trucks......i know this is probally common sense, but i am just double checking before i plop down $$$$

thanks in advance, charles