|
I have seen no such issues and we have a lot of people using them.
It really is up to you and if you feel better with flex, then use the factory unit.
When we started putting solid greasable upper control arm bushings and solid aluminum body-to-frame bushings on our street cars, there were people who screamed that it would crack welds, break things, etc.
100,000 miles later, in a STREET car and countless thousands of miles in race cars and no problems whatsoever.
And I drive this 1975 Firebird everyday.....Robert
__________________
 Did you just pass my 740 at 200 kmh in a 300SD?????
1978 300SD 'Phil' - 1,315,853 Miles And Counting - 1, 317,885 as of 12/27/2012 - 1,333,000 as of 05/10/2013, 1,337,850 as of July 15, 2013, 1,339,000 as of August 13, 2013
100,000 miles since June 2005 Overhaul - Sold January 25th, 2014 After 1,344,246 Miles & 20 Years of Ownership 
|