For the engine mount I laminated two 12mm ply wood sheets together and sanded a 2deg thrust angel on it, which only took 1 1/2 hours for sanding!
Making the cowl mounting bracket's out of 3x20 aluminium stock and mounted them temporary on a sheet of wood to get the exact distance for the holes in the cowl.
Mounting the Bracket's to the firewall and checking the line up of the cowl with the fuse
Temporary engine installed and checked
Using the aluminium bracket's for the cowl will solve the cooling exhaust on the cowl as it gives you plenty of a gap all a round.