help define parts

[mytmopar]

 
set of 6pk carbs.  front carb #'s are 0840 list-6105. back #'s are 0840 list-6107. middle carb #'s are 0850 list-6106.
there is also a number on the base. it is 12R 4253B. this is on all 3 bases. also here is a coupla relays i'd like to know what they are too. the big one has #2983 696 45385 and the other has tung-sol 40A 12V. any help is appreciated. mike in tn

thanks for the ad

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[mytmopar]

 
hi moparbuds!
i found out what the bigger relay is. its the road lamp relay. i have 2 of them. if anybody needs one make an offer. i will try to see if it works before i sell. thanks for the ad!  mike in tn