may need tuning/rejetted but would work as it is a SB thermobog. it will have the smaller primary bores compaired to larger primary bores of a BB thermobog.
may need the same tuning with any q-jet or other carbs brands as well,if you want the most from it.
I use a chebby 327 q-jet on my 318,very close on jetting and tuning.
the q-jet from the 454 should be in the ballpark for the stock 440.
dial them right in with a vac gauge and get the 2ndary airdoor adjusted just right and no bog on the transition tip in.
and the q-jet is cheap to rebuild and mod o fry.
if you stay with a chebby carb the fuel inlet is to the side,the GM/GMC/pontiacs are front feed and can interfear with the rad hose/t-stat location.
you can get the short q-jet inverted flare fitting and ditch the filter to shorten it up some.
grind the chebby throttle lever off and tac a mopar q-jet lever on and all the stock linkage works with the early non emissions chebby q-jets with looking for a carb.
the carbs that have 704**** as the first 3 digets in the # are the bestest...ones with 1704*** or next bestest when junkyarding for them.
if you know how and can fine tune a thermobog it may out do the q-jet.
q-jet areless work tuning. i dont get the how to on thremobogs
