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I’m upgrading to a 600cfm Edelbrock 1409 carb on my boat from the stock 2bbl. It’s a ‘99 305 Vortec. My first choice for intake manifold is the Edelbrock 2716 RPM Performer. However a local guy is selling a GM 12366573 Performer-style intake pretty cheap, probably a new take-off from a crate engine. As far as I can tell the only differences between the two are the the GM intake is almost an inch taller. But I haven’t located an ideal operating range for that manifold. Since my ideal operating range is idle-5500rpm, will the GM manifold adversely affect my holeshot, or do you think the difference will be negligible on a stock motor?
 

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The GMPP intake is similar to the Edelbrock Performer RPM in performance. It’s a very good piece. I run a GMPP LT1/4 carb intake which is pretty much the same thing sans coolant returns and having a different bolting arrangement. It works very well, quite linear when I bury my foot in it pulling hard and staying that way all the way up to red line.

Bogie
 
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