So 40s on a 392. here's what it looks like in stock clearly you're gonna bump into some issues for those of you guys without a 392 and just a rubicon the 392's come with the Mopar two inch suspension lift so it's is sitting on a two-inch suspension lift what you're gonna bump into is the clearance in the rear so what we're gonna do is throw adjustable control arms on it to sling that wheel and tire forward which means we're gonna lose the end caps on the bumper which is no big deal usually take them off anyway just to get the stubby look and then we're doing essentially a three inch spacer lift in the front it's we really need two inches more clearance but that extra inch will balance out the rake for the engine weight and then a two-inch spacer in the rear stay tuned we'll go ahead and post up the finished product.