I have put 7's in the almost 3 dozen mazdas I have built. Yes it does require a little more prep to get them to fit but the result is well worth it. I alsp have never had to notch the frame to make them fit. It takes 30 psi to lift my truck to ride height and rides bitchin. If I did this right here are some pics of my current cab plus. The extra plating is because I built thistruck to hop. Not in these pics are two gussets the were ran up the "A" arm mounts on either side of the bolt holes.