Bigger is usually better, but don't trash that 216. Some of us use them to make a 250+ cubic inch engine with a pressure lubricated 235 crankshaft that still looks like the original 216. The 261 can use the same crankshaft and cylinder head as a 235- - - - -the block, pistons, and connecting rods are the only difference. Parts for both 235s and 261s are fairly easy to find, although main bearings for the 1954 and early 55 engines are getting scarce and expensive. With a slight bit of modification to the block, the later model mains can be substituted for the pricey ones. Late 55 through 62 235s and 261s need to have the water pump modified to fit earlier trucks- - - -the fan position is wrong for the body style. A Weber carb makes a pretty good fishing weight- - - -a Carter YF is a much better choice! You could fabricate a longer lever arm on the Weber throttle quadrant to slow down the speed as you push the gas pedal as a temporary fix.
Jerry
