Im installing a pair of John Mummert Ram Horns on my Y block. The previous owners had the stock manifolds held on with what ever nuts they cound find. Is there a correct length nut that will work in all mount holes on both sides? Grade 5 or 8?

 

A lot of orig parts were fastened on with a special length bolt, and are hard to find now.Measure the depth of the hole, + the thickness of the manifold, if the bolts are longer, cut them off enough so they don't bottom out.

 

No why didnt I think of that, lol. Thanks for your response.

 

Easiest way is to stick the bolt/s in with the manifolds off. I counted 5 threads past the base and cut them. Also, the word at Yblocks forever is DO NOT use manifold to head gaskets. You run the risk of cracking them. I checked the book and sho'nuff, it says to use graphite grease. I'm gonna use some high temp anti sneeze

 

Will do, Im going to use the high temp anti sieze too. I guess not the copper stuff though. Thanks!

 

FEL Pro N 5000 Nickel Graphite Anti Seize Lubricant 1oz USA Copper Free 2400F | eBay
This is what I'm gonna use

 

Great, Ill order some of that too. Thanks for letting me know!