Axle Swap-dana 30 Pinion Angle

I've completely taken apart a completely original '67 CJ5 I've owned since the early '80's and am starting to rebuild and include some upgrades. I plan on replacing the front Dana 27 axle with a '78/'79 NT disk-brake Dana 30 I picked up recently. The PO had the Dana 30 set up in a SOA configuration. I took the axle apart, cut the SOA perches off and am in the process of having the original style perches welded back on at an axle shop (don't have the equipment or experience for that kind of job). I've measured my old perches at 27 1/2" apart on center, 1 3/4" in width but I need to know the pinion angle for the shops perch welding jig. Except for the front axle, 2 1/2" BDS lift and brake upgrade this CJ will remain stock. I know I can wait, put it back together and figure out where the perches should go but I would like get it close now and add shims later if needed.
Any help figuring out the pinion angle would be greatly appreciated!

 

Match the old one?

 

I would tack them for now. You need the suspension loaded with normal weight of engine - body etc. End result should generally be around 4 to 6 degrees. Shims up front generally to be avoided.

 

Forget about the pinion angle. It's not really relevant unless you're cutting off the outer C's. What you need to set is the caster for drivability. 5~7 degrees is what i suggest. My pinion points down very sightly, but make my wheels self center and eliminated death wobble.

Read this
best way to check and set caster

 

As above. I meant to say 4-6 caster.

 

Thanks for the help everyone. Based on your input I'm going to have the perches tacked on to something close to a 7* angle using the lower ball joint surface as a guide. Once I get everything back on the frame I'll measure the caster and move the perches if necessary (and avoid shims). I can't measure the old axle because I sold it (had a powr-lok) and its in northern Mexico now.

 

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