Hej trebor
Had the same problem with my duster -70 and 15" wheels, hit the ground now and then.
I bought new headers from Dough instead, they are mutch better (no cheap solution to the problem)
I have one, bought one in spring 2008, it took some time before he delivered, but the suregrip is allright, you have to mail him to get the right cost for p&p.
Borje
I´m going to rebuild a 360 and put in my duster -70.
I´m thinking of buying a engine rebuild kit from
http://www.performance-auto-parts.com/
Has anyone of you done bussiness whit them or know anything about them?