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we are goin from a 3 to a 4 point motor mount and having some difficulty figuring out measurements and so on.......... we arent sure how far off the stringer mounts have to be off the floor or do they sit right down on the floor???
 

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mount them where ever they are when you get the driveline angle perfect.
Xs 2 assuming the jet is "in" correctly your driveline angle/alignment and depth engagement becomes the basis for the rest of the engine install, "measure and check a dozen, times drill once" call if you need help Tom
 

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leave the motor bolted in on the 3pt mount, use a cherry picker just to hold the rear in the same position, dont jack it up. remote the 3pt bellhousing and install the rear 4pt mount, then do the front, and then just unbolt the 3pt front mounts. the angle with the 3pt was fine just use it as a guide.
 
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