4068 Econo-Kool Freshwater Cooling Kit SK 4068 for small block engines to 360 CID. Purchasers should verify make (Chev., Chrysler, Ford) and CID of engine to ensure correct size. Exhaust manifolds remain on raw water system. V6-V8 engines 262-305-360 CID, both Sterndrive (i/O) and inboard. Especially designed to take advantage of the low capacity raw water pumps used on sterndrive engines. This Econo-Kool system can be installed onto engines with high mounted alternators and/or v-drives.