RE: Great Planes Super Sportster 60 Kit - First Timer
I atached some pics.
This is the standard mount included in most kits. You would need to cut the tabs out on both pieces so the mount can slide together. It's an adjustable type (sliding closer and farther apart) to accept different size motors.
The plans show a pretty straight forward (as far as kits go) firewall setup. What is the question you have on the firewall? From the plans there is no right or down thrust that is "built" in with engine centerline being in line top and bottom with the fuse centerlines.
I included a pic of the landing gear block to highlight my comment about the bottom of the block. I mentioned rounding it but it looks to more angled on the bottomn match the angle of the rib and sheeting that that will make it all flush.
Charlie.. there is bipe version if you can find it. Basically the stock model with another wing on top. You could build a bipe from the stock kit.