ok will check my plan and get back to you
if it is 45 inches long and has a round cowl it is a Great Plane kit the CG for config 1, top wing 48 inches swept, bot wing straight 48 inches
is 4 3/4 inches from leading edge of top wing
it should be powered by a good 60 2 cycle or a 91 4 cycle
never underpower a biplane.
both of mine are powered by magnum 91, wonderfull
http://www.greatplanes.com/manuals/discontinued.html
check for : Super Aeromaster - GPMA0500