First,... you
should have bought "direct bolt on" drop spindles.
This would require you to change nothing.
(still can. Just buy 63-70 drop spindles)
Since you didn't,... here's all the problems.
Plan A:
1) You will need to change your upper and lower ball joints to the 73-87 style.
2) You will need to use 73-87 outer tie rods. (they are 11/16" diameter on the threaded end)
3) buy a $50 set of conversion tie rod sleeves.
(these adapt from your '70 tie rods that are 5/8" on the threaded end,... to the larger 11/16" 73-87 tie rods)
4) Your new inner tie rods need to actually be
'70 outer tie rods so they wil be the correct thread direction to connect to your new 73-87 outer tie rods.
Plan B:
1) You will need to change your upper and lower ball joints to the 73-87 style
2) You will need to use 73-87 outer tie rods. (they are 11/16" diameter on the threaded end)
3) Use a 71-72 center link.
4) use 71-72 inner tie rods
5) use 73-87 outer tie rods
6) use a standard 71-87 tie rod connector
Plan C:
1) You will need to change your upper and lower ball joints to the 73-87 style
2) You will need to use 73-87 outer tie rods. (they are 11/16" diameter on the threaded end)
3) Use a 73-87 center link.
4) use 73-87 inner tie rods
5) use 73-87 outer tie rods
6) use a standard 71-87 tie rod connector
Plan D:
1) Buy 63-70 drop spindles from
www.PerformanceOnline.com for $229 and bolt them on.
2) Change NO ball joints
3) Change NO tie rods
4) Change NO center link