[bigbird90650]

Just wondering if I can drill my own steam holes in a pair of camel hump heads I want to slap on my 400 sbc? My machine shop wants $50 per head to do this. Has anyone done it and how did it work and how do you decide where to drill them? Thanks.

 

[Mike]

http://www.gregsengine.com/350to400.htm

 

[RB69SS396Conv]

Yes you can do it.

It is beyond easy. So easy, even I can do it. And I don't even measure up to the usual standard of "idiot".... I'm more of a moron or an imbecile.

Use a 400 head gasket as a template. Mark the holes. Center-punch them. Drill with about a 3/16" bit. Angle the ones on the intake side over toward the exhaust a little, as they sometimes are right under the thickened place around the head bolt.

 

[d1_bradley]

Item 13 tells you how to do it............ http://www.airflowresearch.com/sbc_install.php

If you aren't comfortable doing this just have it done when you get your valve job.