I bought a reman straight 6 for my van in 04 from autozone for like 1300ish.It had a knock in it from day 1, burns oil like crasy (1 quart every two weeks) and has half the power my original motor had with 300,000 miles on it. Called them and they wont warranty it because it works they said call them back when it fails. Well now my warranty is up and the motor runs but will not pass mass inspection,because it burns so much oil. I'm just so disgusted with the whole thing I can't drag myself out there ands tear it down yet.
Anyway my opinion is just order direct from atk or jasper they are great usually .
And even if you have a problem they warranty it no questions asked.
In my 84 fsb ATK replaced my 302 even after I drowned it in salt water.
Thats just my 2 cents.