Got my Commando style baseplate today... Looks Great... Fit on a Carter AVS 4640SA just fine... No clearance issues...
Now if only I can Locate an un-molested Edelbrock D4B intake...
273 4 BBL lids measure 11 inch diameter... As does the "Super 225" lid...
Note: that black Super 225 lid in bottom photo... is now the lower lid in the top photo... Chrome Powder Coated...