Upgrading my 340

on now on to the carbs
I have a 408 that was built for torque. at 5800 rpm is out of breath. These carb calculators say that a 650 cfm carb was all that i needed. seemed like everybody said that i needed a bigger carb. there was mention of how much vacuum aka restriction there was at top rpm. I hooked a vacuum gauge to a under carb port and to my gauge.
wide open throttle, 3 gear 5800 rpm. i had like 1 inch of vacuum(no restrictiction don't need bigger carb.)
I ran that 650 dp for a year and a half. My only other choice i had on hand was a 850 demon carb(basicly a holley carb)
One day i bought a kit, rebuilt my 850 and jetted it for my attitude. The carb ran better all the way thru the power range, with a better et to boot. I real thought the 850 would drown it or bog causing me to do some squirter changes to make it work. didn't have to change anything but my jet side. It even 60 foots better than the 650
Disadvantage of the 850????? the 650 is a better street carb as it sips fuel better:)
my car travels on a car trailer everywhere it goes.....850 stays on.

Man i can't wait for the snow to get the he ll out of here.:mob: