speedometer hookup help

[stan79chevy]

go to a speedometer shop they will check your speedometer and then put the appropriate ratio wizbang on there for you shouldnt be too much

i cant just give someone some money for something i can figure out on my own. i have a few 205's and my brother in law has 4 or 5 and some 203's as well. ill take the little box off each of them and swap them in and out of mine until i get the box that is what i need. im guessing that little box is a gear reduction of somekind. im thinking that if i get rid of the box and run it straight into the case on that gear thingy in there it should be factory for 4.56. the truck i got the 4.56 gears out of didnt have the box at all.

thanks
stan