[Cal Metal]

The 327 was introduced in 1962. That was before the introduction of the 289 and the 260 cid was just beginning to emerge. The Comets were running the 221 "thin wall" block that morphed into the ones just mentioned.

Even the hot set up in the Mustang in '65 was the K Code 289 with 271 h.p. The '65 Corvette had a SB option of 375 h.p. as well as the 425 h.p. 396 cid motor. As early as '63 the Corvette had a fuel motor producting 360 h.p.

Ford was really behind the curve in both development, cubic inches, and horsepower with regard to the SB. Do remember, though, that these companies had differing philosophies on where they would carve their niche. Ford was primarily devoted in the late 50's and early to mid sixties to a BB philosophy. Chevy, on the otherhand, being the performance wing of GM, had committed their R & D to SB performance; the Corvette being the vanguard for those engines.

Remember the 348 and 409 motors from GM? Not much to talk about. But the 390, 406, and 427's by Ford were pretty potent.
Chrysler, as we all know, was BB from the very beginning with their great wedge (383, 413) and Hemi engines (426).