I was kind of unhappy about using a 40FP or 4xLA on this because the only one I have that's not mounted on a plane is one that's been modified for stunt, and I have no idea how well it'll work with a throttle on it (it's certainly down on power compared to my other similar engines). So I was digging in my engine drawer and came up with a pair of old Fox 40's in a box. One of them even runs. Woohoo! I don't have to cannibalize a plane! And I have junker engine (the front end leaks) to use for fitting up!
They're way bigger than the OS bushed 40s. Fortunately, I had been planning on using motor mount pads anyway, so I just made a different set of pads. The engine fits, after a very slight trimming to the bearers, and a lot of trimming to the pads. The best part is that if it doesn't work out, a 46LA, 40LA, 40FP or whatever will go in there with a different set of pads.
The nose is going to get doublers and triplers -- I've cut out fairly small doublers out of 3/32" plywood to tie the engine bearers and the front landing gear mount together. I just couldn't bear to make a giant doubler out of that heavy plywood to go back to the wing, so once I sheet the fuselage I'll put 1/8" lite ply triplers over the nose back to about the high point of the wing. That should make a strong-enough front end as long as I don't make a habit of unscheduled contact with the ground.