YoungMounty said:
For all you TMH guys. Scrap the gaskets it comes with and invest in Percy's Seal-4-Good aluminum gaskets.
the Percy's 66018 gaskets don't fit my 99 5.0L block, don't know which 5.0L they do fit, but not this one. I spoke to tech support at Percy's/Taylor and they said "just go ahead and put 'em on". They don't even come close to matching the port size on this engine, and won't seal against the block or flange, waaay to big. I sent them back to summit. The Percy's square port 5.0L version might fit(?).
bronchole said:
Which gaskets and bolts dod you order? How did you choose them? Did the install go OK?
Yes! I got 'er done. I ended up using the supplied gaskets with copper rtv sealant, hopefully they hold up a while, no leaks but only over 2 months now. I would have used the Percy's, but nope. This install took me about 14-15 hours, a whole weekend
As some others must have experienced, the rear motor mount bolt is literally impossible to get to after the headers were in. I never could get to it...
The ARP 400-1110 Header Bolts work excellent, after 2 months of daily driving, only 2 bolts needed a slight re-torque. I used permatex anti-sieze on them.
FWIW, I got a call about a week ago from someone at Al's asking if I had recieved my headers. I got the feeling they weren't sure if they had sent them out to me or not, could be wrong though.
GOOD LUCK GUYS