Important if you run D-H/S or SA

[David Lee]

Originally Posted by Paul Precht

David, it would be a good idea to fill them also. A stock 340 typically has about a .100" thick wall and if you run it as a .060" 318, you'll have approx .135" which won't break but it won't make great power either. A lot of aftermarket blocks have about .300" walls.

I was planning that already, when I ready to start my engine, everything will be loaded up for a trip out to Shane's place in Utah and brought back home for assembly. Right now I look like a ghost from body filler from working on the roof