Straight out is 88-89 style while 86-87 has the 90° inlets and out lets, which is just fine. The Afco does have inlet and outlets on the same side (left), and also requires AN fittings for the hoses. As for fittting in stock mounts, yes. If you want a drop in and go, I would use the Pwr like the one havinnoj used. The chinese ones are the same size as oem, and require some minor mods to fit correctly.