MerCruiser GM Small Block Heat Exchangers Products Mercruiser Small V8 (Rear Mount) #78094 $646.00 Mercruiser Small V8 (Front Mount-Late Model) #91036 $795.00 Mercruiser Small V8 (Front Mount-Early Model) #74643 $647.70 Mercruiser Ford Small Block #62472 $599.99 Mercruiser Ford Small Block (5" Tank) #72114 $709.00 Mercruiser Small V8 FORD ENGINE (Front Mount / 5") #61804 $872.50