You'll need a B18C block and B18C crank if you want to use the B18C R rods.

I drove an EK9 the other day that I am considering buying with this combo in it and it was incredible for an NA car. Late 13s, low 14s at the track. But these cars are about circuit anyway.

B18CR bottom end with B16B pistons
B16B head and cams, manifolds
B16B type R ECU (am sure the fuelling would be a bit light on)
Compression is very high at 12:1, the car I drove is fed 98 and has so far last 15000kms with this engine combo.
Stock head gasket.

Now B18C EK9 or EP3? Man it is hard here in NZ for choice...