i have a small block dual plane aluminum intake. it was the winters snowflake casting mark and the firing order casting it also has the webbing castings.but no casting #'s ontop.but underneath it has 701R-36 , 300-36 and 05145.i have never seen a aftermarket intake with the firing order on it but the #'s on the bottom sound like aftermarket #'s did winters industries cast intakes for anyone else besides gm .intake resembles casting #3959594 71/72 vette and z-28 .just wondering!!!!!!

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70RS 327 PHASE 2 BOWTIES 11.1 3.73 POSI UNDERGOING TOTAL RESTORATION
JIMMY

Sounds like a Holley 300-36 Z-28 replica intake. They are good street intakes, and perform like the factory ones. The rpm range is idle up to 7200 rpm, and is a high rise. The 05145 is a date code, and is May 14th of ' 75 , '85 , or ' 95. They should have the firing order on it 18436572, and could have Street Dominator embossed on it somewhere. The area up in front of the water neck might have a checkerboard style mesh look casting on it.While the early Street Dominators had an oil fill hole just like the early factory intakes in this area. They made several changes on these through the years, and I've seen several variations.It's like old cars, anything is possible.

thanks just never seen the firing order on aftermarket ones.

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70RS 327 PHASE 2 BOWTIES 11.1 3.73 POSI UNDERGOING TOTAL RESTORATION
JIMMY