Ok this is a very open ended question. My first v8 swap went well and I just put it in the hole visually centered and made mounts. I am gearing up for next build but with a lot stronger engine. What would be the best way to set it up ? Remember only jack stands and engine hoist in garage build.
Thanks Stan
Now what are you building Stan?
Turbo v8 in 240sx I have a slight vibration in my the ist one I built I changed everything still there. Trans,driveshaft,diff axles wheels. Vibration in the chasie not steering. Used factory rubber mounts.
My brothers truck feels faster than my 240. We will see this spring. I want something faster.
lay down a centerline of the car to center the engine easier, just need a tape measure and string really
+needs moar ls9!
gotta get the driveshaft angles correct or you'll get vibration from u-joint misalignment.
I am not sure how true it is:
I have heard that you do not want the driveshaft to be perfectly straight. I heard you want it angled either up or down or side to side slightly or you can get a BAD vibration.
I would also not visually center the engine. I would put it as far back and as far down as possible!
What drive shaft are you using?
I had one made
hmmm don't know how my CJ5 avoids driveline vibration. it has the most comically insane driveshaft angle you can imagine and it isn't all in the up-down direction either. Drives down the highway like a champ. Always has. 
Stan,
Maybe a showdown between your LSx Nissan and my 5.0 Mazda this year.
It will be LT 1 but that will work
Doesnt the driveshaft angle change everyitme someone puts a lift kit or lowering springs on their car?
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