Thought you guys might find some interest in this.... long sorry
Last Mohican and I both had carb issues on our boats. His 400 pontiac had to be feathered to not stall and my 454 chevy would only turn 3800 rpm and had bogging issues.
He bought a used holley 850 dp marine and out of the box it completely fixed his boat. So, we swap it to my boat. Fixes my issues as well, crisp accel and about 4800 r's.
Then I go buy a brand new holley 850 dp "street" carb. (It was on the shelf instead of waiting on the marine) Out of the box the boat runs like crap and has no power. Check the jetting, the marine has 88's up front and 96's in the back. The street has 80's all around. So I jet the street carb to 88 and 96 and the engine will barely run.
Getting pissed here, so I decide to exchange the brand new street to a brand new marine version of the same carb. Guess what? Out of the box the boat runs like a raped ape.
I wouldn't believe it if I wasn't there but.....