Hello, i just recently purchased new thorley tri-y headers with y pipe for my 1990 f350 with stock 460 and would like to know if anyone out there has done this installment before and how a first timer would go about putting these bad boys on. How difficult is it? Do i have to loosen engine mounts to install them? Is there any tricks or modifications that need to be performed prior and during the installation process? I would appreciate good input so i dont screw this up my first time.

 

Oh! And its a 5 speed manual.