i have a 292 in my '67/'69 K20 with open headers at the moment.
V8's can keep their rumble. this thing sounds like its coming to eat your family.
i also have the 3x1 Offy triple. working on getting enough carbs for it. however, to the comment about sucking gas, it is to my understanding that it would be almost the same as a one barrel, until you put your foot in it.
progressive linkage on the 3 carbs makes it into basically a spread out 4..er..3 barrel carb. spread bore anyone? heh. with a small primary (the center carb) as it can feed all 3 intake runners.
However, when you stomp it, all 3 open up, like a 4 barrel, and the fuel distribution is evened out, causing better power, and PERHAPS better economy, though those 2 words don't really go hand in hand.
but, the 3 carbs, feeding 3 intake runners/ports...all makes sense. progressive linkage simply allows one to have versatility.
and. to prove what a "little" 250 can do, you should all check out Larry Paige, over at inliners, site.
www.t6racing.org
he runs a 250 straight 6, backed by a muncie 4 speed, in a 1964 CHevy II. on his inline, are 3 850 Holleys, i beleive, on a custom sheet metal intake.
watch the videos.
and, if you're inline happy me, smile. alot. especially when he smokes not only rice rockets, but also an elky, and what looks like a later nova or monte. regardless, he's running with 350s and up, and holding his own.
quite an amazing little car.
also, you can check into have lump ports installed. costly, however the key to high speed air flow in the short turn radius of the intake valves.
and, another also. buy Leo Santucci's book. hands down, the bible for 6 cylinder hop up.
who is Leo Santucci? well, he runs a twin turboed 292 with a hybrid head (thats a v8 head chopped up and welded together to make a 6 cylinder head), and he's pusing 10's in the 1/4 mile, with bugs to work out.
sorry for the long post, but, i love my inlines.
and at 18, well, theres not many of us out there anymore...heh.
.later days.
.sam.