55.2-59 Stupid Question about placing engine mounts

[dsraven]

the centerline of the engine needs to be at 90 degrees to the rear axle. you could install everything else however you want but keep those angles to be sure you don't end up with a vibration. the offset diff pumkin is just another angle for the ujoint to factor in but if you decide to go with a 2 piece driveshaft you could be in for trouble. ask any 4x4 guy with a lifted truck that has a 2 piece driveshaft and he will say (or lie) that there is never any vibration. the front ujoint being a down angle and the rear u joint being an equal up angle cancels itself. the front u joint being also angled to the side to line up with the pumkin will also cancel itself if the rear angle is the opposite. thats why you gotta keep the centerline of the engine at 90 degrees to the diff. use a plumb bob and mark the floor under the cente of each part and go from there.

[mongocanfly]

Unless you got a shop full of laser measuring equipment the next best thing is measuring off the frame....it gives you some leeway on angles...the last engine I set, I used for the first time, a digital angle finder...I was amazed at how far you could lift the trans to get just 1deg of angle....so yes it doesnt have to be dead nuts but just try to get it as close as possible...

[65blackfleetside]

I read somewhere in this forum where someone suggested using a 2x4 laying flat to space your motor off the crossmember. mounting engine too low and you will have lots of issues with your front drive accessories hitting fender wells. Take your time even if this means pulling engine in and out a few times. I am about 1" away from the stock firewall with my LS3 and it fits good; however, I cant run the normal width spal electic fan due to water pump clearance issues- I will have to go with a n extra slim fan

[MiraclePieCo]

I noticed several posts regarding engine-trans inclination front to rear. One trick I have discovered is that it's better to have your engine too far down in the rear because you can always add a spacer under your trans mount to shim it up higher. If it's too high to begin with, there's no way to lower it.