HERE'S what's different about '85-'86-'87 trucks (pics)

[swb85]

In response to this thread: http://67-72chevytrucks.com/vboard/s...d.php?t=217743

I bought those stainless headers off ebay that were supposedly for 73-84 only since it seemed there shouldn't be a difference in 85-87 trucks. They gave no explanation why they wouldn't fit 85 & up. Once I got the headers, I saw they were Wysco brand so I logged on to their website to check it out. Their explanation was that the #3 primary interfered with the control arm on 85 & up trucks but fit fine on 73-84. I test fitted the driver's side header tonight to see for myself, and sure enough......





The primary isn't actually touching the control arm, but it's about as close as you can get without touching. They're EXTREMELY nice headers otherwise. They don't interfere with my clutch linkage or anything else on the truck and spark plug clearance is perfect (which isn't the case on my current longtubes) so I still think they were a steal for the price. I'm going to go ahead and keep them and try to muster up the guts to dimple that pretty primary where the interference is. How much clearance do you think I need???