The engine in question is the smaller Lycoming 8 @226 cu. in. which translates to about 3.7 litres. I believe it is the GT series, same as used in some of the Auburns. It originally came with a Shebler SX-222 carb, which was replaced by the former owner with a Stromberg SFM-2. I'm told this was a blessing, as the Sheblers had a reputation for being "incendiary devices disguised as auto parts" by some people. I'm still trying to locate the Dyke's, most likely a 1927 according to Ivan.