The Stovebolt Site Forums The Shop Area Engine Shop Installing a 261

Loosen the rear mount bolts, line up the front bolt holes, drop the front bolts in, tighten the rear mounts and the front mount. An eighth inch misalignment at the rear mounts could easily throw the front off as much as pictured. The mounts are molded rubber; lots of room for error there. The frame could be sprung or misaligned from the factory enough to do that even if you carefully centered the rear bolts in their respective holes. There's lots of room for slop here to make it work. Also remember that you may have to shim the front motor mount to get the u-joint angles equal if you have an open drive line. It the angles aren't equal the u-joints will fight each other and vibrate. Spicer spec. is 1 degree for trucks 1/2 degree for motorhomes. Shim accordingly.