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I'm trying to figure the angle that my 427 needs to tilt back towards the rear of my 66 elco. I'm fabbing a crossmember for the th400, and I'm using solid motor mounts. Should it sit level or lean back a couple degrees?? Thanks!!!!
 

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I'm trying to figure the angle that my 427 needs to tilt back towards the rear of my 66 elco. I'm fabbing a crossmember for the th400, and I'm using solid motor mounts. Should it sit level or lean back a couple degrees?? Thanks!!!!
Driveline angle should be between 1 and 4 degrees down to the back, with 3 being typical, really a function that effects the location of the rear end as well and inherently the pinion angle as well.
 

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We shot for 3 degrees when we welded up the new crossmem for the Richmond.

Unfortunately stock must have been different ( well, not oem 1967, but after 40 yrs), as the welded header flanges did not like the new angle!
 
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A couple of Chevy's that I've checked personally, were at 4 1/2 to 5 degrees down in back. I assumed that was the typical OEM angle.
 
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