The perfect example of less displacement and more horse power.
From Dick Maxwell:
Any 170 cu. in. slant six having a small BBS carburetor (1-1/4" dia. venturi) will produce about 5% more power when the 225 cu. in. BBS carburetor (1-11/32" dia. venturi) is installed. These two carburetors can be identified by measuring their throttle bore diameter. The larger carburetor has a 1-11/16" dia. throttle bore and the smaller carburetor has a 1-9/16" dia. throttle bore. All 170 manual transmission jobs and the 1960 and 1961 170 with automatic transmission have the smaller carburetor. 2. Two Barrels a. Two Barrel Conversion Available from MoPar A two barrel set up (as used on the 225 cu. in. marine engine) is available from MoPar as follows: 1 - 2463849 carburetor 1 - E8467 manifold 1 - 2465310 air cleaner
