Ralphie, There were four different versions of that bent thing in the Avanti. R1 = 289 ci. 4bbl - R2 = 289 ci. 4bbl, Supercharger - R3 = 305 ci. 4bbl, Supercharger - R4 = 305 ci. DUAL 4bbl., or Supercharger. The Avanti with an R4 in 1963 set the Production Car speed record at the salts of 172 + MPH. The Avanti has the Lark frame under it.
will6er, There only 2 years Studebaker made the Avanti, 63 and 64. There was a group of folks that created Avanti II and continued production with Chevy engines into the 70s(?). They didn't use the 230.
Larry
