Ron my hs classmate purchased his 427 S/C CSX3030 new from Shelby Automotive in Venice Ca in Jan 66. Dante Cordone was the sales manager. Rons was delivered with the dual 4 setup however he was told at the factory they would put ANYTHING onthe car he so desired including blowers et all. He took it with the twin 4 barrel setup and once he got home her reversed the rear carb and put center pivot carb bowls on both carbs so it would NOT flood out on sharp corners. Had to manufacture some trick linkage to hook up the Hollys but it worked great.
Driving back to Nebraska with the car in late Jan he heard a rod start knocking in mid Arizona but as long as he kept it under 55mph the noise went away and he maintained
oil pressure. Make it back to Lincoln had theengine pulled and redid the rods and bearings. As it turned out a whole bunch of the early 427s of that year had dirt problems from the factory. Ford issued a tech bulletin authorizing repair on all affected engines. This release of course was prior to ford installing 428s in the cobras.
To my knowledge all of the S/Cs had the 427 side oiler.