Hi all,

The new 440 I've just built has Edelbrock aluminum heads. The headers bolts I was using in my old cast iron heads are from tti, and are 1" long. With the lock washer, that leaves about 7/8" of thread. The header flange and gasket take up about 7/16", so that leaves only about 7/16" thread going into the head.

I've measured the depth of the holes in the new heads, and they're about 1-1/4" from the surface of the header flange (or 13/16" deep from the head surface). So, I could easily go up to 1/2" deeper with my bolts, and not bottom out. That would be 1-1/4" to 1-1/2" header bolts.

Should I go longer, or are my current bolts sufficient? Thanks for any advice.

Roger