Headers

[mechruss]

I went down to Summit and purchased a set of 2453 Hooker headers. While attempting to install them on the 350 I plan on putting in the Blazer, the headers turned out to be about an inch too short. I assumed that Small Block Chevy heads were pretty much all the same. The replacement engine appears to be a 1978 block, with head casting numbers of 462624. Has anybody had the same issues, or have any advice?

 

[76zimmer]

I think its just a matter of lining them up w/ the ports and using the corresponding bolt holes...I believe that front hole was used for accessory mounting brackets on some engines.

 

[nvrenuf]

Yeah, look at the head with the headers / gasket removed, you'll see there's an extra hole.

 

[mechruss]

Now I feel stoopid. That looks like exactly what is wrong. I even took the headers back to Summit, in hopes that they were just mis-packaged, but all of the headers were identical to these. I will double check when I get home this evening. Thank you for your assistance.

 

[Blazooki]

I've had really good luck with the Stage 8 locking header bolts staying tight...it looks like thats what you have...I did have to grind one of the lock washers a bit cause the weld bead where the tube and flange meet was too close to the bolt hole. Its still works fine tho

 

[mechruss]

Confirmed...Went back down to Summit and repurchased the headers. Bolted up perfectly when properly aligned.

I've had really good luck with the Stage 8 locking header bolts staying tight...it looks like thats what you have...I did have to grind one of the lock washers a bit cause the weld bead where the tube and flange meet was too close to the bolt hole. Its still works fine tho

I do have the Stage 8 bolts and I see where the second bolt back on the passenger side looks really tight.