Mastercraft stars and stripes

Going to replace the stingers in this boat. is it possible to get the dimensions for the stingers. also does anyone have any good ideas for mounting the engine rather than bolts straight into the wood. Has anyone else had to replace the floor.

I had replaced the floor and replaced part of stringers.the hardest thing is to place the engine back on the same spot.I mounted my engine 1st and put through bolts with nylon backs.in between the stringers and the washerwhen it bolts threw put a support plate approx.4"x 8".hopefully when you took the floor out you also left a piece for your pattern.put your floor around the engine and your done.