Best budget 360 stroker kit

Why buy a kit balanced and then have to pay another to check the balance???

Buy it unbalanced and have a local shop balance the assembly for you. The local should weigh each component and match them, not pull weights off a box and bobweight it from that, like some of the manufacturers have been known to do.

Get H-beam rods, I'd stay away from the SIR's if possible. Some of the newer I beams rods are pretty nice pieces.