TnBlkC230WZ
02-25-2007, 12:45 PM
I need to replace the leaf spring perches on my GM 12 bolt rear axle in a 71 Nova. I need to know what angle to install them at and what is the angle in relation to, yoke or cover plate? I've searched a while for this, but haven't found it. My drivetrain is a small block with a Muncie 4spd. I plan to change to a TKO or Richmond 5spd overdrive in the next 12 - 18 months if that impacts the angles. I'm installing Hotchkis rear springs in March and need to replace the perches before I do. The old ones are crushed and cracked. They were also installed with too much up angle.
A shop has advised me to install everything, set the pinion angle, then weld them, but I fear torquing the u-bolts down will distort the perches if they are not welded first. It also requires I drive to the shop unwelded. I also don't want to disassemble the rear again to paint the welded areas. Given Currie, Moser and others sell complete rears, there must be a proper angle to set them to before installing the rearend. There must be a correct installation procedure for this.
A shop has advised me to install everything, set the pinion angle, then weld them, but I fear torquing the u-bolts down will distort the perches if they are not welded first. It also requires I drive to the shop unwelded. I also don't want to disassemble the rear again to paint the welded areas. Given Currie, Moser and others sell complete rears, there must be a proper angle to set them to before installing the rearend. There must be a correct installation procedure for this.