WTB_ 390Hp 360c.i. crate motor

I just finished all the cosmetic stuff, right now the car has a 1984 cop car 360.I put on a new carb, headers, new cam and lifters, but truth be told, the motor is a lil tired, could be heads, rings or somethin else. Sooooo instead of gettin into it and do band aid after band aid I fiure that a 360 crtae is the way to go. Warranty and 390 horse outta the box sounds like the best way to go.