Ive got a 91 civic hb with a b18a1 swap and the quife short ratio steering and skunk2 suspension/ exhaust, camerkit and megan racing comtrolarms,tie bar..ect and i built all this on beatup ugly hatchback... well ive got 3 kids and thought why not swap it all over to a 91sedan... will all that fit the sedan like it fits the hatch? Are they the same base platform?

 

AFAIK it will all work.

 

Is the sedan an LX or dx with power steering?

If so, that may be the only thing that will not work..... Unless you swap the entire rear subframes from car to car with their respective manual or power steering. If the sedan is a DX then you should be good to go for everything!