Starting in 1963 with the all new Corvette Stingray, there were engine RPO choices that started with the “L” designation. They are for 1963:
L75 a 327 cubic inch producing 300 horse power
L76 a 327 cubi inch producing 340 horse power
and the:
L84 which was the 327 fuelie producing 360 horse power.
This continued in 1964 and 1965 [...]



