AT/MT fuel systems

hello all. im just wondering here,
what are the differences in a carb that is designed for automatic and one that is for manual trans?
if one gets a carb that is "for automatic" and puts it on a vehicle with the manual trans, what is the down side of this?
and also viceversa, if one gets a carb for a car with stick trans and puts it on an automatic?
also, if the carb is for a 200 cid engine and one uses it on a 144 cid motor, or a 170? is it bad performance?
less mpg? more things to worry in the long run?

just a thought

same carb on the 170 and 200

even if they are automatic or standard?
what about a 240 to a 200?

http://cgi.ebay.com/ebaymotors/rebuilt-ford-1bbl-6cyc-holley-model-1946-carb-K_W0QQcmdZViewItemQQ_trksidZp1638Q2em118Q2el1247QQcategoryZ33550QQihZ003QQitemZ130246251046QQrdZ1QQsspagenameZWD1V

what about this? will it work ok on a 200 ford with manual trans?

http://cgi.ebay.com/ebaymotors/rebuilt-ford-1bbl-6cyc-carter-model-y-fa-carb-L_W0QQitemZ140257498974QQcmdZViewItemQQptZMotors_Car_Truck_Parts_Accessories?_trksid=p4506.m20.l1116

or this?

http://cgi.ebay.com/ebaymotors/rebuilt-ford-1bbl-6cyc-carter-model-y-fa-carb-L_W0QQitemZ140257498974QQcmdZViewItemQQptZMotors_Car_Truck_Parts_Accessories?_trksid=p4506.m20.l1116


or even this?

not planning on buying either of them, but just to get an idea..

You are sending me to school on that one Donivan... makes sense and never thought of that question before... good one beanses... I love VintAGE-Vans!!!

im in love too!
with vans and the people in this site. but lets not get sentimental hahaha

so any of those carbs mentioned above are good for a ford 200?