All the GP kits I've seen looked like they were almost engineered by the same guy. The construction with all the little diecut sheet parts that had to be glued together to make a larger sheet part were all the same.
One thing about Great Planes kits is that you can download the assembly manuals for all the current ones from the Tower site.
Slow Poke
http://manuals.hobbico.com/gpm/gpma0492-manual.pdf
RV-4
http://manuals.hobbico.com/gpm/gpma0180-manual.pdf