[olddog]

A member here, who owns an original, sent me PDF files of original SAI brochures, quite a few years ago.

There were two different 427 engines.

The street Cobra had two 4V holleys, 10.4:1 compression and 425 Hp.

The Competition Cobra says 4V holley with center pivot float bowls (as if only one carb),
12.4:1 compression and 480 Hp. It also says magnesium intake, alloy heads,
light weight valves, and alloy water pump.

No mention of side oiler verses center oiler.

PS
The 428 street brochure was dated 8/1/66. The other two did not have a date.