ORIGINAL: red head
Probably by placing some washers ( over the bolts ) between the firewall and engine mount will just about make it right. You get a little weight and it pushes the engine forward a bit. ENJOY !!! RED
Actually I've done this and was not happy with the results. The washers can get unevenly sucked into the firewall and change the thrust angles. A half-degree makes a difference, and I was not happy with the way the plane flew.