header thread size for 5.0 engine

[t2jeff]

Does anyone know the thread size of the bolt that mounts headers to the block? Motor is from a 90 LX 5.0........

Thanks,

jeff

 

[Broncobowsher]

3/8-16
Standard coarse thread 3/8" bolt.
I ordered a set of ARP header bolts for a big block Chevy because it cost less for that application then for a Ford %)

 

[t2jeff]

what about the length?

 

[Broncobowsher]

what about the length?

Depends on how thick the gaskets and flanges are and how deep are the holes in the head.