Looks like the original factory intake on the 413 pictured above. Same one that was on my 413 industrial/motorhome engine. Raised carb pad and 4 hole plenum.
I've never built one, only examined the one I have in the pic below.
Ooops ... you had a better eye and a clearer mind than I did at 2am this morning ... CJ did mention a stock intake and the pic does show the 4 holes.
When I picked up that 73 Discoverer it did have that iron intake and helly carb .... the first thing I did was put the Streetmaster intake and TQ on it ...,ran a TON better.
