OK, that's the basics. What it doesn't tell you "The Monojet came in 3 sizes. The smallest has a 1-7/16" throttle bore and 1 7/32" venturi. It was used on 4 cylinder engines. The second largest and most common has a 1-11/16" throttle bore and a 1-5/16" venturi. This is the 250 carb. The largest has a 1-11/16 throttle bore and 1-1/2" venturi. It was used on the 292 in heavy duty applications. The throttle bores are the same on the 250 and 292 carbs but the 292 has a larger venturi. The small carb flows 160cfm - 250 carb flows 210cfm and 292 carb flows 250cfm." I swiped this from
stovebolt.You'll need to get some more info carbs to see what the differences are between the Buick and your truck. Such as jet, power valve size, I don't have a sheet on the carb handy to what else there night be.
Larry
68 C20 327/465 daily driver 4:56 och!
63 C20 292/420 Camper Detroit Locker 4:10 posi
65 C10 ?/powerglide Custom Cab AC,PB,PS,4xflash