Figuring you have a background in Honda's, I would expect that you have learned already that you only have one header. I guess not.
Must haves... lets see...
Since you want to rebuild (what do you consider a rebuild? checking out the internals then slapping on a timing belt? or like dropping $2000 on a real rebuild?) I would just fork out the money for a B18C/C1/C5 swap. You will make a lot more power that way.
Suspension is also a typical upgrade. Lowering springs and struts, coilover sleeves and struts, or full coilovers.