Raising the engine by 10mm?

[adrianreeve]

Just discovered that my exhaust manifold touches the top chassis rail - grrrrrr! My choices are pie cut the manifold tubes near the flange and bend the whole thing up, or put 10mm spacers under the engine mounts to raise the front of the engine. Would this cause problems with the gearbox mount being permanently misaligned, and will the slight change of prop shaft output angle wear the pro shaft quickly?

Cheers

Adrian