I mounted a Holley 2300 on a stock 261 engine. I cut away the top of the stock manifolf, made a phenolic mounting plate for the carb.The stock exhaust heat was retained. This carb is off a 266 cube IHC V-8, flows about 320 cfm when rated as 2bbl. The carb is far superior to the NOS Rochester B that was on the engine, idles better, has much better throttle response and power and the fuel mileage actually increased about 2 mpg.Holley 2300-4150 carbs can be tuned to deliver excellent fuel mileage and power if used for the proper application.
261 in a 51 PU
