External balance it. Here's your rods.
http://www.ebay.com/itm/SCA-2ICR612...Parts_Accessories&hash=item589a63227c&vxp=mtr
To get a stroker to breath and make good power your gunna need heads. The same 360 with good heads will out power a stoker that does not breath. Stock type heads touched a bit on a stroker will make prob 430hp ish or so. The 360 with good heads will be in the 500hp+ mark for less $$.
http://m.youtube.com/watch?v=OeX3LWkJKWg