Quote:
Originally Posted by Montierth
So questions:
1. Are 71-72 outer tie rods same as 73-87? to be able to use the thread adapter by CPP. Vs changing completely over to 71-72 linkage
2. Is the engine crossmember the same 67-72?
3. The tubular control arms are different part numbers 63-70 and 71-72? Does this have to do with the boots? What makes the tubular different from stock control arms? The stock control arms are the same for the years.
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WOW. Lots of conflicting info here.
1) The problem with tie rods are that there are two ends to measure.
The threaded end and the tapered end.
The conversion tie rod sleeves convert from 5/8” to 11/16” thread.
( the tapered ends are different also from 63-70, 71-72, and 73-87)
But the real confusion is that the 63-70 OUTER tie rods are LH THREAD.
71-72 and 73-87 OUTER tie rods are RH THREAD.
So to keep a 63-70 centerlink with the later disc brake outer tie rod ends (71-72 OR 73-87) and keep the thread pitch compatible,..
You need to use a 63-70 OUTER tie rod in the INNER location.
This will allow you to use the 71-72 or 73-87 OUTER tie rod to match whichever year spindle you are using.
Not sure why companies list he conversion tie rod sleeves at 73-87. Because 71-72 outer tie rods are also 11/16” diameter.
2) crossmember is the same with the exception of the steel brake line tab location.
Behind the crossmember on 63-70 trucks.
In front of the crossmember on 71-72 trucks.
3) the tubular control arms have different part numbers because of the different ball joints that are used. The arms themselves are the same.