390 stroker build advice

Thanks guys all makes sense to me. This is my first mopar stroker build so I want to make sure I get it right from the start. I think the mutha thumpr will give me what I want as far as sound goes, just hope it give the hp too. From reading a few other threads on here maybe I would be better going with a Weiand stealth ? Seems to have a much broader power range than the eddy air gap. It's all going to run through a 904 with a cheetah forward pattern manual valve body, 2800-3200 stall & LSD with 3.27 & 26 in tyres. Car weighs in around the 2800 mark. Any idea what it may run down the 1/4 ?