Rear engine mounts/alignment

[Josh in Pa]

I am trying to re-install a '92 350 mag into my boat. The alignment tool will not slide into the coupler. It appears that the coupler is too low. I did a little searching and the suggestions were that the rear motor mounts are shot. Is this correct? I assume the rubber is worn, letting the rear of the motor "sag"? Any other possibilities? This boat project is getting out of hand! I bought it several months ago "ready for the water with a full tank of gas," and have replaced the stringers and floor, engine block, both manifolds, and all bellows. Thanks for your help,
Josh

 

[Bondo]

Re: Rear engine mounts/alignment

Ayuh,...

My 1st Guess is,...
Either the Rear motor mounts have settled,...
Or,...
You rebuilt the Front motor mounting blocks, Too High......