86/87 heads on 85 block?

[SS/GNX]

Is there a difference, or is there any reason the 86/87 heads won't bolt on an 85 block?

I might be selling my heads in the not too distant future and somebody whos interested wants to know...

 

[jwillettgn]

They are the same.

Jim

 

[SS/GNX]

Just making sure! Thanks very much!

 

[WIKEDV6]

Is there a difference, or is there any reason the 86/87 heads won't bolt on an 85 block?

I might be selling my heads in the not too distant future and somebody whos interested wants to know...

I believe they are all 8445 castings but make sure you uses the correct head bolts for 84/85 vs 86/87. The thread comes all the way to the deck on the 84/85 block where the 86/87 is about 1/4" below the deck. Using the wrong bolt can bottom out and damage/crack the deck and the thread. You can also use the 6293 casting that comes on the 4.1s. I would stick with the 8445 casting though.

HTH

Prasad

 

[Boost231]

I believe they are all 8445 castings but make sure you uses the correct head bolts for 84/85 vs 86/87. The thread comes all the way to the deck on the 84/85 block where the 86/87 is about 1/4" below the deck. Using the wrong bolt can bottom out and damage/crack the deck and the thread. You can also use the 6293 casting that comes on the 4.1s. I would stick with the 8445 casting though.

HTH

Prasad

+1 good info

 

[SS/GNX]

Damn Prasad, thanks! I would have never known that!

 

[WIKEDV6]

Damn Prasad, thanks! I would have never known that!

You're welcome bud!!

Prasad