The 360 blocks will not work if you already have the 340 stroker kit , the maiin brg size is different & the kit will not fit , the 360 is also a smaller bore so it will not make as much CI , the bore will not go as far & you need to sonic check the block past .030 overbore . You can alway go to the R3 / W8 combo & make about 700 HP using Mopar parts .