Headers I've been working on!

[Fast-6.0]

Yeah we are using an 03 style rail, I really do not see how you can run them with 04.5-07 rails, but we decided to heavily mod the 03's with new spouts, these are the sample arms I have recieved that are adjustable , going solid lifter, custom springs, custom push rods, and a large billet cam.....

Yeah those are what we have run. We made them work with 04 rails. Too much work for the result though IMO. I have run stock rockers with solid lifters and .500" valve lift at 5500 rpm in my 6.0, so the Harland is not requirement.

 

[sonic_superduty]

Sweet, I really wanted ease of adjustment, I would think the stockers won't like life very well for very long at 5500 rpm, but it does amaze me how well the stock valve train will take the abuse!