A +4 long rod stroker ported to match has killer bottom and top end, but it also opens up another can of worms because of the porting, bigger carbs to feed it, intake manifolds, clutch, it will run you about 2g's but it is very fast whereas just dropping in a wiseco crank is about 379$.....its your call. If you decide to go with a stroker I suggest you get in touch with Jim at Passion Racing Engines to port your cylinders, he really knows his shit when it comes to that and he can also hook you up with all the parts you will need for it at competitive prices. His screen name here is PassionRE so get in touch with him.